diff --git a/lab-python-functions.ipynb b/lab-python-functions.ipynb
index 44d337b..5dc2c3d 100644
--- a/lab-python-functions.ipynb
+++ b/lab-python-functions.ipynb
@@ -43,11 +43,122 @@
     "\n",
     "\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "3eeac03c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def initialize_inventory(products):\n",
+    "    inventory = {}\n",
+    "\n",
+    "    for product in products: \n",
+    "        amount = int(input(f\"How many products are of {product}?\"))\n",
+    "        inventory[product] = amount\n",
+    "        \n",
+    "    return(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "5c9a3292",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_costumer_orders():\n",
+    "    costumer_orders = set()\n",
+    "    petition = \"Yes\".lower()\n",
+    "\n",
+    "    while  petition == \"Yes\".lower():\n",
+    "        order = input(\"Write a product to order\")\n",
+    "        costumer_orders.add(order)\n",
+    "        petition = input(\"Do you want to order another product? (Yes/No)\").lower()\n",
+    "\n",
+    "    return(costumer_orders)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "874892fb",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def update_inventory(costumer_orders,inventory):\n",
+    "    for product in costumer_orders:\n",
+    "        inventory[product] -= 1 \n",
+    "    return(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "2e33efc5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def calculate_order_statistics(costumer_orders,products): \n",
+    "\n",
+    "    total_products_ordered = len(costumer_orders)\n",
+    "    percentage_unique_products = total_products_ordered / len(products) * 100 \n",
+    "    return(total_products_ordered, percentage_unique_products)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "id": "6bdfadf1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_order_statistics(order_statistics):\n",
+    "    print(order_statistics)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "0ddd67f9",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def print_updated_inventory(inventory):\n",
+    "    print(inventory)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "62a8bde3",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(2, 40.0)\n",
+      "{'t-shirt': 47, 'mug': 383, 'hat': 38, 'book': 298, 'keychain': 29}\n"
+     ]
+    }
+   ],
+   "source": [
+    "products = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"]\n",
+    "inventory = initialize_inventory(products)\n",
+    "costumer_orders = get_costumer_orders()\n",
+    "update_inventory(costumer_orders, inventory)\n",
+    "order_statistics = calculate_order_statistics(costumer_orders,products)\n",
+    "print_order_statistics(order_statistics)\n",
+    "print_updated_inventory(inventory)\n",
+    "\n"
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "ds",
    "language": "python",
    "name": "python3"
   },
@@ -61,7 +172,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.12.12"
   }
  },
  "nbformat": 4,