diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..f343fd3 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,11 +43,268 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 46,
+   "id": "96c6c262",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 49,
+   "id": "013581f7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        inventory[product] = int(input(\"Enter the quantity of the product: \"))\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 51,
+   "id": "db16832e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "inventory = initialize_inventory(products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 52,
+   "id": "3094bb29",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 10, 'mug': 15, 'hat': 12, 'book': 1, 'keychain': 3}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 75,
+   "id": "b83ba19f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Thank you for your order!\n"
+     ]
+    }
+   ],
+   "source": [
+    "def get_customer_orders():\n",
+    "    customer_orders = set()\n",
+    "    while True:\n",
+    "        customer_order = input(\"Which product would you like to order? \")\n",
+    "        customer_orders.add(customer_order)\n",
+    "\n",
+    "        extra_order = input(\"Would you like to order another product? (yes/no) \").lower()\n",
+    "        if extra_order != 'yes':\n",
+    "            print(\"Thank you for your order!\")\n",
+    "            break\n",
+    "\n",
+    "        \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 109,
+   "id": "5f8348b7",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'hat'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 107,
+   "id": "38b16cb5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        if product in inventory:\n",
+    "            inventory[product] -= 1\n",
+    "    return inventory\n",
+    "\n",
+    "inventory = update_inventory(customer_orders, inventory)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 108,
+   "id": "7fe63fd8",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 2, 'mug': 1, 'hat': -1, 'book': 4, 'keychain': 5}\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 100,
+   "id": "4249c6d8",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_orders = len(customer_orders)\n",
+    "    total_percentage = (total_orders / len(products)) * 100\n",
+    "        \n",
+    "    return total_orders, total_percentage\n",
+    "\n",
+    "total_orders, total_percentage = calculate_order_statistics(customer_orders, products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 101,
+   "id": "593d258b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(1, 20.0)\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(calculate_order_statistics(customer_orders, products))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 102,
+   "id": "9cfd8934",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "order_statistics = calculate_order_statistics(customer_orders, products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 103,
+   "id": "17ac8752",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    total_orders, total_percentage = order_statistics\n",
+    "    print(\"Total orders: \", total_orders)\n",
+    "    print(\"Total percentage of products ordered: \", total_percentage)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 104,
+   "id": "61670600",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Total orders:  1\n",
+      "Total percentage of products ordered:  20.0\n",
+      "None\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(print_order_statistics(order_statistics))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 105,
+   "id": "7d94e55a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_updated_inventory(inventory):\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(\"Inventory: \", product, \": \", quantity)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 106,
+   "id": "2ecf04ec",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Inventory:  t-shirt :  2\n",
+      "Inventory:  mug :  1\n",
+      "Inventory:  hat :  0\n",
+      "Inventory:  book :  4\n",
+      "Inventory:  keychain :  5\n",
+      "None\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(print_updated_inventory(inventory))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "46cc2890",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -61,7 +318,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.14.2"
   }
  },
  "nbformat": 4,