diff --git a/.ipynb_checkpoints/lab-python-functions-checkpoint.ipynb b/.ipynb_checkpoints/lab-python-functions-checkpoint.ipynb
new file mode 100644
index 0000000..1935518
--- /dev/null
+++ b/.ipynb_checkpoints/lab-python-functions-checkpoint.ipynb
@@ -0,0 +1,375 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "25d7736c-ba17-4aff-b6bb-66eba20fbf4e",
+   "metadata": {},
+   "source": [
+    "# Lab | Functions"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "588191d8-1610-4938-aa11-83fa93557370",
+   "metadata": {
+    "tags": []
+   },
+   "source": [
+    "## Exercise: Managing Customer Orders with Functions\n",
+    "\n",
+    "In the previous exercise, you improved the code for managing customer orders by using loops and flow control. Now, let's take it a step further and refactor the code by introducing functions.\n",
+    "\n",
+    "Follow the steps below to complete the exercise:\n",
+    "\n",
+    "1. Define a function named `initialize_inventory` that takes `products` as a parameter. Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
+    "\n",
+    "2. Define a function named `get_customer_orders` that takes no parameters. Inside the function, implement the code for prompting the user to enter the product names using a loop. The function should return the `customer_orders` set.\n",
+    "\n",
+    "3. Define a function named `update_inventory` that takes `customer_orders` and `inventory` as parameters. Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "4. Define a function named `calculate_order_statistics` that takes `customer_orders` and `products` as parameters. Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered). The function should return these values.\n",
+    "\n",
+    "5. Define a function named `print_order_statistics` that takes `order_statistics` as a parameter. Inside the function, implement the code for printing the order statistics.\n",
+    "\n",
+    "6. Define a function named `print_updated_inventory` that takes `inventory` as a parameter. Inside the function, implement the code for printing the updated inventory.\n",
+    "\n",
+    "7. Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
+    "\n",
+    "Hints for functions:\n",
+    "\n",
+    "- Consider the input parameters required for each function and their return values.\n",
+    "- Utilize function parameters and return values to transfer data between functions.\n",
+    "- Test your functions individually to ensure they work correctly.\n",
+    "\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 32,
+   "id": "c089bf4d-1314-46a0-b2d7-6d1832ee9d34",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input the amount of t-shirts:  400\n",
+      "Please input the amount of mugs:  300\n",
+      "Please input the amount of hats:  200\n",
+      "Please input the amount of books:  100\n",
+      "Please input the amount of keychains:  50\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The total number of items in stock is: 1050\n",
+      "Final Dictionary: {'t-shirt': 400, 'mug': 300, 'hat': 200, 'book': 100, 'keychain': 50}\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 1. Define a function named initialize_inventory that takes products as a parameter.\n",
+    "# Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
+    "\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    \n",
+    "    for product in products:\n",
+    "        amount = int(input(f\"Please input the amount of {product}s: \"))\n",
+    "        inventory[product] = amount \n",
+    "        \n",
+    "    total_items = sum(inventory.values())\n",
+    "    print(f\"The total number of items in stock is: {total_items}\")\n",
+    "    \n",
+    "    return inventory\n",
+    "\n",
+    "# Test:\n",
+    "my_inventory = initialize_inventory(products)\n",
+    "print(\"Final Dictionary:\", my_inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 54,
+   "id": "992ab48e-189e-4e82-82d8-eaa3c3562297",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input product 1 you wish to order:  mug\n",
+      "Please input product 2 you wish to order:  book\n",
+      "Please input product 3 you wish to order:  keychain\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Your final order is: {'book', 'mug', 'keychain'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 2. Define a function named get_customer_orders that takes no parameters.\n",
+    "# Inside the function, implement the code for prompting the user to enter the product names using a loop. \n",
+    "# The function should return the customer_orders set.\n",
+    "\n",
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    \n",
+    "    for i in range(3):\n",
+    "        order = input(f\"Please input product {i+1} you wish to order: \")\n",
+    "        \n",
+    "        if order in products:\n",
+    "            customer_orders.add(order)\n",
+    "        else:\n",
+    "            print(\"Sorry, we don't have that!\")\n",
+    "            \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders() \n",
+    "print(\"\\nYour final order is:\", customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 78,
+   "id": "591bcda2-8716-4550-97d3-627d67c2e4ef",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated t-shirt: 399 left in stock.\n",
+      "Updated mug: 299 left in stock.\n",
+      "\n",
+      "Final Inventory Status: {'t-shirt': 399, 'mug': 299, 'hat': 200, 'books': 100, 'keychains': 50}\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 3. Define a function named update_inventory that takes customer_orders and inventory as parameters.\n",
+    "# Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    \n",
+    "    for product in customer_orders:\n",
+    "        \n",
+    "        if product in inventory:\n",
+    "            inventory[product] -= 1\n",
+    "            print(f\"Updated {product}: {inventory[product]} left in stock.\")\n",
+    "        else:\n",
+    "            print(f\"Warning: {product} is not in the inventory records.\")\n",
+    "    \n",
+    "    return inventory\n",
+    "\n",
+    "# Test\n",
+    "current_inventory = {\"t-shirt\": 400, \"mug\": 300, \"hat\": 200, \"books\": 100, \"keychains\": 50}\n",
+    "orders = {\"t-shirt\", \"mug\"} \n",
+    "\n",
+    "updated_stock = update_inventory(orders, current_inventory)\n",
+    "\n",
+    "print(\"\\nFinal Inventory Status:\", updated_stock)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 124,
+   "id": "4b850db7-88ee-410f-b4a2-62747bce1464",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 4. Define a function named calculate_order_statistics that takes customer_orders and products as parameters.\n",
+    "# Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered).\n",
+    "# The function should return these values.\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "\n",
+    "    total_ordered = len(customer_orders)\n",
+    "    total_products = len(products)\n",
+    "\n",
+    "    try:\n",
+    "        percentage = (total_ordered / total_products) * 100\n",
+    "    except ZeroDivisionError:\n",
+    "        percentage = 0\n",
+    "        \n",
+    "    return total_ordered, percentage"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 128,
+   "id": "5fb0b98e-5c76-466f-9a61-18535fbc39ec",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "-- Order Summary --\n",
+      "Total products ordered: 2\n",
+      "Percentage of products ordered: 40.00%\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 5. Define a function named print_order_statistics that takes order_statistics as a parameter.\n",
+    "# Inside the function, implement the code for printing the order statistics.\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "\n",
+    "    total_ordered, percentage = order_statistics\n",
+    "    print(\"-- Order Summary --\")\n",
+    "    print(f\"Total products ordered: {total_ordered}\")\n",
+    "    \n",
+    "    print(f\"Percentage of products ordered: {percentage:.2f}%\")\n",
+    "\n",
+    "# Test\n",
+    "my_stats = (2, 40.0) \n",
+    "print_order_statistics(my_stats)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 202,
+   "id": "c14ff6f1-cd52-46f0-a477-4715985a7700",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated t-shirt: 399 left in stock.\n",
+      "Updated mug: 299 left in stock.\n",
+      "-- Updated inventory --\n",
+      "Product: t-shirt | Stock: 399\n",
+      "Product: mug | Stock: 299\n",
+      "Product: hat | Stock: 200\n",
+      "Product: books | Stock: 100\n",
+      "Product: keychains | Stock: 50\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 6. Define a function named print_updated_inventory that takes inventory as a parameter.\n",
+    "# Inside the function, implement the code for printing the updated inventory.\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "\n",
+    "    print(\"-- Updated inventory --\")\n",
+    "    \n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"Product: {product} | Stock: {quantity}\")\n",
+    "\n",
+    "# Test\n",
+    "current_inventory = {\"t-shirt\": 400, \"mug\": 300, \"hat\": 200, \"books\": 100, \"keychains\": 50}\n",
+    "orders = {\"t-shirt\", \"mug\"}\n",
+    "\n",
+    "updated_stock = update_inventory(orders, current_inventory)\n",
+    "print_updated_inventory(updated_stock)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 206,
+   "id": "948cefd8-4e58-47b1-9ba6-dff9745651a4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input the amount of t-shirts:  400\n",
+      "Please input the amount of mugs:  300\n",
+      "Please input the amount of hats:  200\n",
+      "Please input the amount of books:  100\n",
+      "Please input the amount of keychains:  50\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The total number of items in stock is: 1050\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input product 1 you wish to order:  mug\n",
+      "Please input product 2 you wish to order:  hat\n",
+      "Please input product 3 you wish to order:  keychain\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated hat: 199 left in stock.\n",
+      "Updated mug: 299 left in stock.\n",
+      "Updated keychain: 49 left in stock.\n",
+      "-- Order Summary --\n",
+      "Total products ordered: 3\n",
+      "Percentage of products ordered: 60.00%\n",
+      "-- Updated inventory --\n",
+      "Product: t-shirt | Stock: 400\n",
+      "Product: mug | Stock: 299\n",
+      "Product: hat | Stock: 199\n",
+      "Product: book | Stock: 100\n",
+      "Product: keychain | Stock: 49\n",
+      "Success! The order has been processed and the inventory is updated.\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 7. Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
+    "\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "current_inventory = initialize_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "update_inventory(customer_orders, current_inventory)\n",
+    "\n",
+    "order_stats = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print_order_statistics(order_stats)\n",
+    "print_updated_inventory(current_inventory)\n",
+    "\n",
+    "print(\"Success! The order has been processed and the inventory is updated.\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.7"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..1935518 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -10,7 +10,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0c581062-8967-4d93-b06e-62833222f930",
+   "id": "588191d8-1610-4938-aa11-83fa93557370",
    "metadata": {
     "tags": []
    },
@@ -43,6 +43,312 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 32,
+   "id": "c089bf4d-1314-46a0-b2d7-6d1832ee9d34",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input the amount of t-shirts:  400\n",
+      "Please input the amount of mugs:  300\n",
+      "Please input the amount of hats:  200\n",
+      "Please input the amount of books:  100\n",
+      "Please input the amount of keychains:  50\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The total number of items in stock is: 1050\n",
+      "Final Dictionary: {'t-shirt': 400, 'mug': 300, 'hat': 200, 'book': 100, 'keychain': 50}\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 1. Define a function named initialize_inventory that takes products as a parameter.\n",
+    "# Inside the function, implement the code for initializing the inventory dictionary using a loop and user input.\n",
+    "\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    \n",
+    "    for product in products:\n",
+    "        amount = int(input(f\"Please input the amount of {product}s: \"))\n",
+    "        inventory[product] = amount \n",
+    "        \n",
+    "    total_items = sum(inventory.values())\n",
+    "    print(f\"The total number of items in stock is: {total_items}\")\n",
+    "    \n",
+    "    return inventory\n",
+    "\n",
+    "# Test:\n",
+    "my_inventory = initialize_inventory(products)\n",
+    "print(\"Final Dictionary:\", my_inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 54,
+   "id": "992ab48e-189e-4e82-82d8-eaa3c3562297",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input product 1 you wish to order:  mug\n",
+      "Please input product 2 you wish to order:  book\n",
+      "Please input product 3 you wish to order:  keychain\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Your final order is: {'book', 'mug', 'keychain'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 2. Define a function named get_customer_orders that takes no parameters.\n",
+    "# Inside the function, implement the code for prompting the user to enter the product names using a loop. \n",
+    "# The function should return the customer_orders set.\n",
+    "\n",
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    \n",
+    "    for i in range(3):\n",
+    "        order = input(f\"Please input product {i+1} you wish to order: \")\n",
+    "        \n",
+    "        if order in products:\n",
+    "            customer_orders.add(order)\n",
+    "        else:\n",
+    "            print(\"Sorry, we don't have that!\")\n",
+    "            \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders() \n",
+    "print(\"\\nYour final order is:\", customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 78,
+   "id": "591bcda2-8716-4550-97d3-627d67c2e4ef",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated t-shirt: 399 left in stock.\n",
+      "Updated mug: 299 left in stock.\n",
+      "\n",
+      "Final Inventory Status: {'t-shirt': 399, 'mug': 299, 'hat': 200, 'books': 100, 'keychains': 50}\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 3. Define a function named update_inventory that takes customer_orders and inventory as parameters.\n",
+    "# Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    \n",
+    "    for product in customer_orders:\n",
+    "        \n",
+    "        if product in inventory:\n",
+    "            inventory[product] -= 1\n",
+    "            print(f\"Updated {product}: {inventory[product]} left in stock.\")\n",
+    "        else:\n",
+    "            print(f\"Warning: {product} is not in the inventory records.\")\n",
+    "    \n",
+    "    return inventory\n",
+    "\n",
+    "# Test\n",
+    "current_inventory = {\"t-shirt\": 400, \"mug\": 300, \"hat\": 200, \"books\": 100, \"keychains\": 50}\n",
+    "orders = {\"t-shirt\", \"mug\"} \n",
+    "\n",
+    "updated_stock = update_inventory(orders, current_inventory)\n",
+    "\n",
+    "print(\"\\nFinal Inventory Status:\", updated_stock)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 124,
+   "id": "4b850db7-88ee-410f-b4a2-62747bce1464",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 4. Define a function named calculate_order_statistics that takes customer_orders and products as parameters.\n",
+    "# Inside the function, implement the code for calculating the order statistics (total products ordered, and percentage of unique products ordered).\n",
+    "# The function should return these values.\n",
+    "\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "\n",
+    "    total_ordered = len(customer_orders)\n",
+    "    total_products = len(products)\n",
+    "\n",
+    "    try:\n",
+    "        percentage = (total_ordered / total_products) * 100\n",
+    "    except ZeroDivisionError:\n",
+    "        percentage = 0\n",
+    "        \n",
+    "    return total_ordered, percentage"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 128,
+   "id": "5fb0b98e-5c76-466f-9a61-18535fbc39ec",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "-- Order Summary --\n",
+      "Total products ordered: 2\n",
+      "Percentage of products ordered: 40.00%\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 5. Define a function named print_order_statistics that takes order_statistics as a parameter.\n",
+    "# Inside the function, implement the code for printing the order statistics.\n",
+    "\n",
+    "def print_order_statistics(order_statistics):\n",
+    "\n",
+    "    total_ordered, percentage = order_statistics\n",
+    "    print(\"-- Order Summary --\")\n",
+    "    print(f\"Total products ordered: {total_ordered}\")\n",
+    "    \n",
+    "    print(f\"Percentage of products ordered: {percentage:.2f}%\")\n",
+    "\n",
+    "# Test\n",
+    "my_stats = (2, 40.0) \n",
+    "print_order_statistics(my_stats)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 202,
+   "id": "c14ff6f1-cd52-46f0-a477-4715985a7700",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated t-shirt: 399 left in stock.\n",
+      "Updated mug: 299 left in stock.\n",
+      "-- Updated inventory --\n",
+      "Product: t-shirt | Stock: 399\n",
+      "Product: mug | Stock: 299\n",
+      "Product: hat | Stock: 200\n",
+      "Product: books | Stock: 100\n",
+      "Product: keychains | Stock: 50\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 6. Define a function named print_updated_inventory that takes inventory as a parameter.\n",
+    "# Inside the function, implement the code for printing the updated inventory.\n",
+    "\n",
+    "def print_updated_inventory(inventory):\n",
+    "\n",
+    "    print(\"-- Updated inventory --\")\n",
+    "    \n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"Product: {product} | Stock: {quantity}\")\n",
+    "\n",
+    "# Test\n",
+    "current_inventory = {\"t-shirt\": 400, \"mug\": 300, \"hat\": 200, \"books\": 100, \"keychains\": 50}\n",
+    "orders = {\"t-shirt\", \"mug\"}\n",
+    "\n",
+    "updated_stock = update_inventory(orders, current_inventory)\n",
+    "print_updated_inventory(updated_stock)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 206,
+   "id": "948cefd8-4e58-47b1-9ba6-dff9745651a4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input the amount of t-shirts:  400\n",
+      "Please input the amount of mugs:  300\n",
+      "Please input the amount of hats:  200\n",
+      "Please input the amount of books:  100\n",
+      "Please input the amount of keychains:  50\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The total number of items in stock is: 1050\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Please input product 1 you wish to order:  mug\n",
+      "Please input product 2 you wish to order:  hat\n",
+      "Please input product 3 you wish to order:  keychain\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated hat: 199 left in stock.\n",
+      "Updated mug: 299 left in stock.\n",
+      "Updated keychain: 49 left in stock.\n",
+      "-- Order Summary --\n",
+      "Total products ordered: 3\n",
+      "Percentage of products ordered: 60.00%\n",
+      "-- Updated inventory --\n",
+      "Product: t-shirt | Stock: 400\n",
+      "Product: mug | Stock: 299\n",
+      "Product: hat | Stock: 199\n",
+      "Product: book | Stock: 100\n",
+      "Product: keychain | Stock: 49\n",
+      "Success! The order has been processed and the inventory is updated.\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 7. Call the functions in the appropriate sequence to execute the program and manage customer orders.\n",
+    "\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "current_inventory = initialize_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "update_inventory(customer_orders, current_inventory)\n",
+    "\n",
+    "order_stats = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print_order_statistics(order_stats)\n",
+    "print_updated_inventory(current_inventory)\n",
+    "\n",
+    "print(\"Success! The order has been processed and the inventory is updated.\")"
+   ]
   }
  ],
  "metadata": {
@@ -61,7 +367,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,