diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..64a1716 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -72,11 +72,157 @@
     "\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": "623e27d2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "try:\n",
+    "    products_input = input(\"Enter list of products separated by space\")\n",
+    "    products = products_input.split()\n",
+    "except:\n",
+    "    raise TypeError(\"Invalid Input\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "46404730",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products: list):\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",
+    "                    inventory[product] = quantity\n",
+    "                    valid_input = True\n",
+    "                else:\n",
+    "                    print(\"Quantity cannot be negative. Please enter a valid quantity.\")\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter quantity in number.\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "fe29cb6d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_total_price(customer_orders: set):\n",
+    "    order_price = []\n",
+    "    for order in customer_orders:\n",
+    "        valid_ = False\n",
+    "        while not valid_:\n",
+    "            try:\n",
+    "                unit_price= int(input(f\"Enter the price of {order}:\"))\n",
+    "                if unit_price > 0:\n",
+    "                    order_price.append(unit_price)\n",
+    "                    valid_ = True \n",
+    "                else:\n",
+    "                    print(\"Unit price cannot be negative or zero. Please enter a valid unit price.\")\n",
+    "            except ValueError:\n",
+    "                print(\"Invalid input. Please enter unit price in number.\")\n",
+    "    return sum(order_price)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "20f16e51",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_customer_orders(inventory: dict):\n",
+    "    '''Enter Customers Order'''\n",
+    "    valid_num = False\n",
+    "    customer_orders = []\n",
+    "    while not valid_num:\n",
+    "        try:\n",
+    "            cust_orders_num = int(input(f\"Enter the number of customer orders: \"))\n",
+    "            if cust_orders_num > 0:\n",
+    "                for i in range(0,cust_orders_num):                    \n",
+    "                    valid_prod = False\n",
+    "                    while not valid_prod:\n",
+    "                        try:\n",
+    "                            order_input = input(f\"Enter the name of a product that a customer wants to order:\")\n",
+    "                            for key,val in inventory.items():\n",
+    "                                if order_input == key and val > 0:\n",
+    "                                    customer_orders.append(order_input)\n",
+    "                                    valid_prod = True\n",
+    "                        except:\n",
+    "                            print(\"Your ordered product is NOT available\")       \n",
+    "                                \n",
+    "                valid_num = True \n",
+    "            else:\n",
+    "                print(\"Number of orders cannot be negative or zero. Please enter a valid unit price.\")\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter unit price in number.\")\n",
+    "    \n",
+    "    return set(customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "f90694e7",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid input. Please enter quantity in number.\n"
+     ]
+    }
+   ],
+   "source": [
+    "begin_inventory = initialize_inventory(products=products)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c52ac4e4",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "customer_orders = get_customer_orders(inventory=begin_inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "819d9160",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "total_order_price = calculate_total_price(customer_orders=customer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bc6ea322",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "help(ValueError)"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +236,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,