diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..7573bf2 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,13 +43,165 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "9eec74b5-c3f9-499c-bee2-eb82f53407c5",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Enter the quantity available for each product:\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "t-shirt:  10\n",
+      "mug:  10\n",
+      "hat:  10\n",
+      "book:  10\n",
+      "keychain:  10\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Available products: ['t-shirt', 'mug', 'hat', 'book', 'keychain']\n"
+     ]
+    },
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Enter a product to order:  hat\n",
+      "Do you want to add another product? (yes/no):  yes\n",
+      "Enter a product to order:  mug\n",
+      "Do you want to add another product? (yes/no):  no\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Order Statistics:\n",
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 40.00%\n",
+      "\n",
+      "Updated Inventory:\n",
+      "t-shirt: 10\n",
+      "mug: 9\n",
+      "hat: 9\n",
+      "book: 10\n",
+      "keychain: 10\n"
+     ]
+    }
+   ],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    print(\"Enter the quantity available for each product:\")\n",
+    "    for product in products:\n",
+    "        quantity = int(input(f\"{product}: \"))\n",
+    "        inventory[product] = quantity\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "# customer orders\n",
+    "def get_customer_orders(products):\n",
+    "    customer_orders = set()\n",
+    "    print(\"\\nAvailable products:\", products)\n",
+    "\n",
+    "    while True:\n",
+    "        product_choice = input(\"Enter a product to order: \").lower()\n",
+    "        if product_choice in products:\n",
+    "            customer_orders.add(product_choice)\n",
+    "        else:\n",
+    "            print(\"Invalid product, please choose from the list.\")\n",
+    "\n",
+    "        another = input(\"Do you want to add another product? (yes/no): \").lower()\n",
+    "        if another != \"yes\":\n",
+    "            break\n",
+    "\n",
+    "    return customer_orders\n",
+    "\n",
+    "\n",
+    "# update inventory based on customer orders\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        inventory[product] -= 1\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "# calculate order statistics\n",
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    total_products_available = len(products)\n",
+    "    percentage_ordered = (total_products_ordered / total_products_available) * 100\n",
+    "    return (total_products_ordered, percentage_ordered)\n",
+    "\n",
+    "\n",
+    "# print order statistics\n",
+    "def print_order_statistics(order_statistics):\n",
+    "    print(\"\\nOrder Statistics:\")\n",
+    "    print(f\"Total Products Ordered: {order_statistics[0]}\")\n",
+    "    print(f\"Percentage of Products Ordered: {order_statistics[1]:.2f}%\")\n",
+    "\n",
+    "\n",
+    "# print the updated inventory\n",
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"\\nUpdated Inventory:\")\n",
+    "    for product in inventory:\n",
+    "        print(f\"{product}: {inventory[product]}\")\n",
+    "\n",
+    "\n",
+    "# program\n",
+    "\n",
+    "def main():\n",
+    "    products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "    # initialize inventory\n",
+    "    inventory = initialize_inventory(products)\n",
+    "\n",
+    "    # get customer orders\n",
+    "    customer_orders = get_customer_orders(products)\n",
+    "\n",
+    "    # update inventory\n",
+    "    inventory = update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "    # calculate statistics\n",
+    "    order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "    # print results\n",
+    "    print_order_statistics(order_statistics)\n",
+    "    print_updated_inventory(inventory)\n",
+    "\n",
+    "\n",
+    "if __name__ == \"__main__\":\n",
+    "    main()\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "87fcbf5f-4958-47c2-ba3b-82607648628c",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python [conda env:base] *",
    "language": "python",
-   "name": "python3"
+   "name": "conda-base-py"
   },
   "language_info": {
    "codemirror_mode": {
@@ -61,7 +213,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,