diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index f4c6ef6..e022be3 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -2,7 +2,6 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "25d7736c-ba17-4aff-b6bb-66eba20fbf4e",
    "metadata": {},
    "source": [
     "# Lab | Error Handling"
@@ -10,7 +9,6 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bc99b386-7508-47a0-bcdb-d969deaf6c8b",
    "metadata": {},
    "source": [
     "## Exercise: Error Handling for Managing Customer Orders\n",
@@ -72,11 +70,67 @@
     "\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": 6,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "    for product in products:\n",
+    "        valid_quantity = False\n",
+    "        while not valid_quantity:\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",
+    "                valid_quantity = True\n",
+    "            except ValueError as error:\n",
+    "                print(f\"Error: {error}\")\n",
+    "        inventory[product] = quantity\n",
+    "    return inventory\n",
+    "\n",
+    "# Or, in another way:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "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",
+    "                    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 a valid quantity.\")\n",
+    "    return inventory"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#Modify the calculate_total_price function to include error handling."
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -90,7 +144,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.8.5"
   }
  },
  "nbformat": 4,