diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..79ffadb 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,13 +72,99 @@
     "\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": 1,
+   "id": "039285aa-17bb-45ca-a44e-a64204ce2b9e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Step 1: Initialize inventory with error handling\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        valid_input = False\n",
+    "        while not valid_input:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity < 0:\n",
+    "                    raise ValueError(\"Quantity cannot be negative.\")\n",
+    "                inventory[product] = quantity\n",
+    "                valid_input = True\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Error: {e}\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "eac682a1-65cc-4b94-8a1a-0ae27f3aef11",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Step 2: Calculate total price with error handling\n",
+    "def calculate_total_price(product, inventory):\n",
+    "    while True:\n",
+    "        try:\n",
+    "            price = float(input(f\"Enter the price for {product}: \"))\n",
+    "            if price < 0:\n",
+    "                raise ValueError(\"Price cannot be negative.\")\n",
+    "            quantity = inventory[product]\n",
+    "            return price * quantity\n",
+    "        except ValueError as e:\n",
+    "            print(f\"Error: {e}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "77b6f687-13df-4b64-b88c-0874a4cf7a8c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Step 3: Get customer orders with error handling\n",
+    "def get_customer_orders(inventory):\n",
+    "    orders = {}\n",
+    "    while True:\n",
+    "        try:\n",
+    "            num_orders = int(input(\"Enter the number of orders: \"))\n",
+    "            if num_orders <= 0:\n",
+    "                raise ValueError(\"Number of orders must be positive.\")\n",
+    "            break\n",
+    "        except ValueError as e:\n",
+    "            print(f\"Error: {e}\")\n",
+    "\n",
+    "    for i in range(num_orders):\n",
+    "        valid_product = False\n",
+    "        while not valid_product:\n",
+    "            product_name = input(f\"Enter product name for order {i+1}: \")\n",
+    "            if product_name not in inventory:\n",
+    "                print(\"Error: Product not in inventory. Try again.\")\n",
+    "            elif inventory[product_name] == 0:\n",
+    "                print(\"Error: Product out of stock. Try again.\")\n",
+    "            else:\n",
+    "                valid_product = True\n",
+    "                orders[product_name] = orders.get(product_name, 0) + 1\n",
+    "                inventory[product_name] -= 1\n",
+    "    return orders"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f2189fbd-b5ec-4ed9-be18-96e734517be9",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python [conda env:base] *",
    "language": "python",
-   "name": "python3"
+   "name": "conda-base-py"
   },
   "language_info": {
    "codemirror_mode": {
@@ -90,7 +176,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,