diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..2da8eb6 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,11 +43,221 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "9525f028",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "2a41c21d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        quantity = int(input(f\"Enter the quantity of {product}: \"))\n",
+    "        inventory[product] = quantity\n",
+    "    return inventory\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "id": "7c98f4f8",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Inventory: {'t-shirt': 4, 'mug': 5, 'hat': 6, 'book': 7, 'keychain': 8}\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "print(\"Inventory:\", inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 20,
+   "id": "af331c34",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Customer Orders: {'book', 'hat', 'mug'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "def get_customer_orders(): \n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "        product_name = input(\"Enter product name: \")\n",
+    "        customer_orders.add(product_name)\n",
+    "        continue_entering = input(\"Do you want to enter another product? (yes/no): \").lower()\n",
+    "        if continue_entering != \"yes\":\n",
+    "            break\n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "print(\"Customer Orders:\", customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 21,
+   "id": "2c5df9de",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Updated Inventory: {'t-shirt': 4, 'mug': 4, 'hat': 5, 'book': 6, 'keychain': 8}\n"
+     ]
+    }
+   ],
+   "source": [
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        product = product.strip()\n",
+    "        inventory[product] = inventory[product] - 1\n",
+    "\n",
+    "    return inventory\n",
+    "updated_inventory = update_inventory(customer_orders, inventory)\n",
+    "print(\"Updated Inventory:\", updated_inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 22,
+   "id": "2e0d1db4",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Order statistics: (3, 60.0)\n"
+     ]
+    }
+   ],
+   "source": [
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    percentage_ordered = (len(customer_orders) / len(products)) * 100\n",
+    "\n",
+    "    return (total_products_ordered, percentage_ordered)\n",
+    "\n",
+    "\n",
+    "order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print(\"Order statistics:\", order_statistics)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 23,
+   "id": "5a1b4e4b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total Products Ordered: 3\n",
+      "Percentage of Products Ordered: 60.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    print(\"Total Products Ordered:\", order_statistics[0])\n",
+    "    print(\"Percentage of Products Ordered:\", order_statistics[1])\n",
+    "\n",
+    "\n",
+    "print_order_statistics(order_statistics)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "id": "6e9e377d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "t-shirt: 4\n",
+      "mug: 4\n",
+      "hat: 5\n",
+      "book: 6\n",
+      "keychain: 8\n"
+     ]
+    }
+   ],
+   "source": [
+    "def print_updated_inventory(inventory):\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"{product}: {quantity}\")\n",
+    "\n",
+    "\n",
+    "print_updated_inventory(updated_inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 27,
+   "id": "6ed63107",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total Products Ordered: 2\n",
+      "Percentage of Products Ordered: 40.0\n",
+      "t-shirt: 10\n",
+      "mug: 19\n",
+      "hat: 30\n",
+      "book: 39\n",
+      "keychain: 50\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "\n",
+    "customer_orders = get_customer_orders()\n",
+    "\n",
+    "updated_inventory = update_inventory(customer_orders, inventory)\n",
+    "\n",
+    "order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "\n",
+    "print_order_statistics(order_statistics)\n",
+    "\n",
+    "print_updated_inventory(updated_inventory)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -61,7 +271,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.14.6"
   }
  },
  "nbformat": 4,