diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..6423e71 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,11 +43,158 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "ce94ea53",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "Order Statistics\n",
+      "Total Products Ordered: 3\n",
+      "Percentage of Products Ordered: 60.0%\n",
+      "\n",
+      "Updated Inventory:\n",
+      "t-shirt: 9\n",
+      "mug: 4\n",
+      "hat: 7\n",
+      "book: 3\n",
+      "keychain: 12\n"
+     ]
+    }
+   ],
+   "source": [
+    "def get_inventory(products):\n",
+    "    inventory = {}\n",
+    "\n",
+    "    for product in products:\n",
+    "        quantity = int(\n",
+    "            input(f\"Enter quantity for {product}: \")\n",
+    "        )\n",
+    "        inventory[product] = quantity\n",
+    "\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "def get_customer_orders(products):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while True:\n",
+    "\n",
+    "        order = input(\n",
+    "            \"Enter a product to order: \"\n",
+    "        )\n",
+    "\n",
+    "        if order in products:\n",
+    "            customer_orders.add(order)\n",
+    "\n",
+    "        another_product = input(\n",
+    "            \"Do you want to add another product? (yes/no): \"\n",
+    "        )\n",
+    "\n",
+    "        if another_product.lower() == \"no\":\n",
+    "            break\n",
+    "\n",
+    "    return customer_orders\n",
+    "\n",
+    "\n",
+    "def update_inventory(inventory, customer_orders):\n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        inventory[product] -= 1\n",
+    "\n",
+    "    return inventory\n",
+    "\n",
+    "\n",
+    "def calculate_order_statistics(\n",
+    "    customer_orders,\n",
+    "    products\n",
+    "):\n",
+    "\n",
+    "    total_products_ordered = len(\n",
+    "        customer_orders\n",
+    "    )\n",
+    "\n",
+    "    percentage_ordered = (\n",
+    "        total_products_ordered\n",
+    "        / len(products)\n",
+    "    ) * 100\n",
+    "\n",
+    "    return (\n",
+    "        total_products_ordered,\n",
+    "        percentage_ordered\n",
+    "    )\n",
+    "\n",
+    "\n",
+    "def print_order_statistics(\n",
+    "    order_statistics\n",
+    "):\n",
+    "\n",
+    "    print(\"\\nOrder Statistics\")\n",
+    "    print(\n",
+    "        f\"Total Products Ordered: {order_statistics[0]}\"\n",
+    "    )\n",
+    "    print(\n",
+    "        f\"Percentage of Products Ordered: {order_statistics[1]}%\"\n",
+    "    )\n",
+    "\n",
+    "\n",
+    "def print_updated_inventory(\n",
+    "    inventory\n",
+    "):\n",
+    "\n",
+    "    print(\"\\nUpdated Inventory:\")\n",
+    "\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(\n",
+    "            f\"{product}: {quantity}\"\n",
+    "        )\n",
+    "\n",
+    "\n",
+    "products = [\n",
+    "    \"t-shirt\",\n",
+    "    \"mug\",\n",
+    "    \"hat\",\n",
+    "    \"book\",\n",
+    "    \"keychain\"\n",
+    "]\n",
+    "\n",
+    "inventory = get_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders(\n",
+    "    products\n",
+    ")\n",
+    "\n",
+    "order_statistics = (\n",
+    "    calculate_order_statistics(\n",
+    "        customer_orders,\n",
+    "        products\n",
+    "    )\n",
+    ")\n",
+    "\n",
+    "inventory = update_inventory(\n",
+    "    inventory,\n",
+    "    customer_orders\n",
+    ")\n",
+    "\n",
+    "print_order_statistics(\n",
+    "    order_statistics\n",
+    ")\n",
+    "\n",
+    "print_updated_inventory(\n",
+    "    inventory\n",
+    ")"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -61,7 +208,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.14.6"
   }
  },
  "nbformat": 4,