diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..f9f7bea 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,6 +43,139 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "df56862e-4a7d-430f-9fd3-ee9b56c9e7e7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9096f556-89ea-4654-a93f-cc192fb0f1ef",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    \n",
+    "    for product in products:\n",
+    "        quantity = int(input(f\"How many {product} are in stock? \"))\n",
+    "        inventory[product] = quantity\n",
+    "\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "e6af1698-515b-45f7-a2a5-a95eb50a54e9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders():\n",
+    "    \n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    product = input(\"Enter a product you want to order: \")\n",
+    "    customer_orders.add(product)\n",
+    "\n",
+    "    add_another_product = input(\"Do you want to add another product? (yes/no): \")\n",
+    "\n",
+    "    while add_another_product == \"yes\":\n",
+    "        product = input(\"Enter a product you want to order: \")\n",
+    "        customer_orders.add(product) \n",
+    "    \n",
+    "        add_another_product = input(\"Do you want to add another product? (yes/no): \") \n",
+    "\n",
+    "    return customer_orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ad1c3d68-9fe2-453f-8069-dacbb50eb788",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        inventory[product] = inventory[product] - 1\n",
+    "\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "abd6f136-3068-4ba2-a547-2480daad3641",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    \n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    percentage_ordered = (len (customer_orders) / len(products) * 100)\n",
+    "    order_statistics = (total_products_ordered, percentage_ordered)\n",
+    "\n",
+    "    return order_statistics"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b6784e50-1db8-46da-8ba1-24866f3cec0b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    total_products_ordered, percentage_ordered = order_statistics\n",
+    "    \n",
+    "    print(\"Order Statistics:\")\n",
+    "    print(\"Total Products Ordered:\", total_products_ordered)\n",
+    "    print(f\"Percentage of Products Ordered: {percentage_ordered}%\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "998de9a0-bb32-4f25-80e2-aebbfc7f3b6e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"Updated Inventory:\")\n",
+    "    \n",
+    "    for product, quantity in inventory.items(): \n",
+    "        print(product, \":\", quantity) "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b6885596-cf0f-4c9e-be97-87e5b51bba28",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "inventory = initialize_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "\n",
+    "inventory = update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "statistics = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print_order_statistics(statistics) \n",
+    "\n",
+    "print_updated_inventory(inventory)"
+   ]
   }
  ],
  "metadata": {
@@ -61,7 +194,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,