diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..e4204c8 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,164 @@
     "\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": 26,
+   "id": "3568d015",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\n",
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                quantity = int(input(f\"Enter the quantity of {product}s available: \"))\n",
+    "                if quantity < 0:\n",
+    "                    raise ValueError(\"Invalid quantity! Please enter a non-negative value.\")\n",
+    "                inventory[product] = quantity\n",
+    "                break\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7456c646",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Error: doll is not available.\n",
+      "{'mug', 'book'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#3. Modify the `get_customer_orders` function to include error handling.\n",
+    "   #- If the user enters an invalid number of orders (e.g., a negative value or a non-numeric value), display an error message and ask them to re-enter the number of orders.\n",
+    "   #- If the user enters an invalid product name (e.g., a product name that is not in the inventory), \n",
+    "   # or that doesn't have stock available, display an error message and ask them to re-enter the product name. \n",
+    "   # *Hint: you will need to pass inventory as a parameter*\n",
+    "   #- Use a try-except block to handle the error and continue prompting the user until a valid product name is entered.\n",
+    "\n",
+    "def get_customer_orders(inventory):\n",
+    "    customer_orders = set()\n",
+    "\n",
+    "    while True:\n",
+    "            try:\n",
+    "                order_number = int(input(\"Enter the number of orders: \"))\n",
+    "                if order_number <= 0:\n",
+    "                    raise ValueError(\"Invalid number of orders! Please enter a non-negative value.\")\n",
+    "                break\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "\n",
+    "    for _ in range(order_number):\n",
+    "\n",
+    "        while True:\n",
+    "            try:\n",
+    "                product = input(\"Enter product name: \")\n",
+    "                if product not in inventory:\n",
+    "                    raise ValueError(f\"Product {product} is not available.\")\n",
+    "                if inventory[product] <= 0:\n",
+    "                    raise ValueError(\"Product is out of stock\")\n",
+    "            \n",
+    "                customer_orders.add(product)\n",
+    "                break  \n",
+    "            \n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "                \n",
+    "                \n",
+    "    return customer_orders\n",
+    "\n",
+    "customer_orders = get_customer_orders(inventory)\n",
+    "print(customer_orders)\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 34,
+   "id": "052c06f6",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 3, 'mug': 19, 'hat': 22, 'book': 32, 'keychain': 12}\n"
+     ]
+    }
+   ],
+   "source": [
+    "#3. Define a function named `update_inventory` that takes `customer_orders` and `inventory` as parameters. \n",
+    "# Inside the function, implement the code for updating the inventory dictionary based on the customer orders.\n",
+    "\n",
+    "\n",
+    "def update_inventory(customer_orders, inventory):\n",
+    "    for product in customer_orders:\n",
+    "        inventory[product] -= 1\n",
+    "    return inventory    \n",
+    "\n",
+    "updated_inventory = update_inventory(customer_orders, inventory)\n",
+    "print(updated_inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "id": "49c3b175",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "34.0\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 2. Modify the `calculate_total_price` function to include error handling.\n",
+    "   # - If the user enters an invalid price (e.g., a negative value or a non-numeric value), \n",
+    "   # display an error message and ask them to re-enter the price for that product.\n",
+    "   #- Use a try-except block to handle the error and continue prompting the user until a valid price is entered.\n",
+    "\n",
+    "def total_price_of_order(customer_orders):\n",
+    "    product_price = {}  \n",
+    "\n",
+    "    for product in customer_orders:\n",
+    "        valid_price = False\n",
+    "        while not valid_price:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of {product}: \"))\n",
+    "                if price < 0:\n",
+    "                    raise ValueError(\"Invalid price! Please enter a non-negative value.\")\n",
+    "                product_price[product] = price \n",
+    "                valid_price = True\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "\n",
+    "    total_price = sum(product_price.values())\n",
+    "    return total_price\n",
+    "\n",
+    "total_price_of_order = total_price_of_order(customer_orders)\n",
+    "print(total_price_of_order)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +243,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.9"
   }
  },
  "nbformat": 4,