diff --git a/lab-python-error-handling.ipynb b/lab-python-error-handling.ipynb
index 3e50ef8..ef4af74 100644
--- a/lab-python-error-handling.ipynb
+++ b/lab-python-error-handling.ipynb
@@ -41,12 +41,118 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "id": "cc2c441d-9dcf-4817-b097-cf6cbe440846",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Inventory initialized successfully.\n",
+      "Inventory initialization process completed.\n",
+      "The product 'book' is out of stock.\n",
+      "The product 'book' is out of stock.\n",
+      "Customer orders received successfully.\n",
+      "Customer order process completed.\n",
+      "The total price for your orders is: 9.0€\n",
+      "Price entry process completed.\n"
+     ]
+    }
+   ],
    "source": [
-    "# your code goes here"
+    "# your code goes here\n",
+    "\n",
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "\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\"Invalid input: {e}. Please enter a valid quantity.\")\n",
+    "    return inventory\n",
+    "\n",
+    "try:\n",
+    "    inventory = initialize_inventory(products)\n",
+    "except Exception as e:\n",
+    "    print(f\"An error occurred while initializing inventory: {e}\")\n",
+    "else:\n",
+    "    print(\"Inventory initialized successfully.\")\n",
+    "finally:\n",
+    "    print(\"Inventory initialization process completed.\")\n",
+    "\n",
+    "\n",
+    "def get_customer_orders(inventory, products):\n",
+    "    customer_orders = set()\n",
+    "    valid_input = False\n",
+    "    while not valid_input:\n",
+    "        try:\n",
+    "            num_ord = int(input(\"Enter the number of products you want to order: \"))\n",
+    "            if num_ord < 0:\n",
+    "                raise ValueError(\"Quantity cannot be negative.\")\n",
+    "            valid_input = True\n",
+    "        except ValueError as e:\n",
+    "            print(f\"Invalid input: {e}. Please enter a valid quantity.\")\n",
+    "    \n",
+    "    for i in range(num_ord):\n",
+    "        valid_order = False\n",
+    "        while not valid_order:\n",
+    "            try:\n",
+    "                order = input(f\"Enter the name of a product from the list: {products} \")\n",
+    "                if order not in inventory:\n",
+    "                    raise KeyError(f\"'{order}' is not a valid product.\")\n",
+    "                if inventory[order] == 0:\n",
+    "                    raise ValueError(f\"The product '{order}' is out of stock.\")\n",
+    "                customer_orders.add(order)\n",
+    "                valid_order = True\n",
+    "            except KeyError as e:\n",
+    "                print(e)\n",
+    "            except ValueError as e:\n",
+    "                print(e)\n",
+    "    \n",
+    "    return customer_orders\n",
+    "\n",
+    "try:\n",
+    "    customer_orders = get_customer_orders(inventory, products)\n",
+    "except Exception as e:\n",
+    "    print(f\"An error occurred while getting customer orders: {e}\")\n",
+    "else:\n",
+    "    print(\"Customer orders received successfully.\")\n",
+    "finally:\n",
+    "    print(\"Customer order process completed.\")\n",
+    "\n",
+    "\n",
+    "def enter_price(customer_orders):\n",
+    "    total_price = 0\n",
+    "    for product in customer_orders:\n",
+    "        while True:\n",
+    "            try:\n",
+    "                price = float(input(f\"Enter the price of the {product}: \"))\n",
+    "                if price < 0:\n",
+    "                    raise ValueError(\"Price cannot be negative.\")\n",
+    "                total_price += price\n",
+    "                break\n",
+    "            except ValueError as e:\n",
+    "                print(f\"Invalid input: {e}. Please enter a valid price.\")\n",
+    "    \n",
+    "    return f\"{total_price}€\"\n",
+    "\n",
+    "try:\n",
+    "    total_prices = enter_price(customer_orders)\n",
+    "except Exception as e:\n",
+    "    print(f\"An error occurred while entering the prices: {e}\")\n",
+    "else:\n",
+    "    print(f\"The total price for your orders is: {total_prices}\")\n",
+    "finally:\n",
+    "    print(\"Price entry process completed.\")\n"
    ]
   }
  ],
@@ -66,7 +172,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.10.0"
   }
  },
  "nbformat": 4,