diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..8d7d6f1 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,205 @@
     "\n",
     "4. Test your code by running the program and deliberately entering invalid quantities and product names. Make sure the error handling mechanism works as expected.\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "4b213ad5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "\n",
+    "    for product in products:\n",
+    "        valid_input = False\n",
+    "\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity < 0:\n",
+    "                    print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n",
+    "                else:\n",
+    "                    inventory[product] = quantity\n",
+    "                    valid_input = True\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a whole number.\")\n",
+    "\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "46964589",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    valid_input = False\n",
+    "    while not valid_input:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"How many different products does the customer want to order? \"))\n",
+    "            if num_orders < 0:\n",
+    "                print(\"Number of orders cannot be negative. Please enter a valid number.\")\n",
+    "            else:\n",
+    "                valid_input = True\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter a whole number.\")\n",
+    "\n",
+    "    for i in range(num_orders):\n",
+    "        valid_product = False\n",
+    "\n",
+    "        while not valid_product:\n",
+    "            product = input(f\"Enter product {i + 1}: \").lower()\n",
+    "\n",
+    "            if product not in inventory:\n",
+    "                print(\"This product does not exist. Please enter a valid product.\")\n",
+    "            elif inventory[product] <= 0:\n",
+    "                print(\"This product is out of stock. Please choose another product.\")\n",
+    "            else:\n",
+    "                customer_orders.add(product)\n",
+    "                valid_product = True\n",
+    "\n",
+    "    return customer_orders\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "c1e466ef",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        inventory[product] -= 1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "ebf1c00a",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics(customer_orders, products):\n",
+    "    total_products_ordered = len(customer_orders)\n",
+    "    percentage_products_ordered = (total_products_ordered / len(products)) * 100\n",
+    "\n",
+    "    order_statistics = (total_products_ordered, percentage_products_ordered)\n",
+    "\n",
+    "    return order_statistics\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "1927d4c7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    print(\"Order Statistics\")\n",
+    "    print(f\"Total Products Ordered: {order_statistics[0]}\")\n",
+    "    print(f\"Percentage of Products Ordered: {order_statistics[1]}%\")\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "b69982b9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_updated_inventory(inventory):\n",
+    "    print(\"Updated Inventory\")\n",
+    "    for product, quantity in inventory.items():\n",
+    "        print(f\"{product}: {quantity}\")\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "4867c682",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders):\n",
+    "    total_price = 0\n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        valid_input = False\n",
+    "\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price for {product}: \"))\n",
+    "                if price < 0:\n",
+    "                    print(\"Price cannot be negative. Please enter a valid price.\")\n",
+    "                else:\n",
+    "                    total_price += price\n",
+    "                    valid_input = True\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter a valid number.\")\n",
+    "\n",
+    "    return total_price\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "5f047dad",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "This product does not exist. Please enter a valid product.\n",
+      "This product does not exist. Please enter a valid product.\n",
+      "Order Statistics\n",
+      "Total Products Ordered: 3\n",
+      "Percentage of Products Ordered: 60.0%\n",
+      "Updated Inventory\n",
+      "t-shirt: 100\n",
+      "mug: 49\n",
+      "hat: 19\n",
+      "book: 5\n",
+      "keychain: 1\n",
+      "Total Price: 130.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventory = initialize_inventory(products)\n",
+    "customer_orders = get_customer_orders(inventory)\n",
+    "update_inventory(customer_orders, inventory)\n",
+    "order_statistics = calculate_order_statistics(customer_orders, products)\n",
+    "print_order_statistics(order_statistics)\n",
+    "print_updated_inventory(inventory)\n",
+    "\n",
+    "total_price = calculate_total_price(customer_orders)\n",
+    "print(f\"Total Price: {total_price}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "58f2feb1",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +284,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,