diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/.DS_Store differ
diff --git a/lab-python-flow-control.ipynb b/lab-python-flow-control.ipynb
index f4c7391..9178fc5 100644
--- a/lab-python-flow-control.ipynb
+++ b/lab-python-flow-control.ipynb
@@ -13,7 +13,9 @@
   {
    "cell_type": "markdown",
    "id": "3851fcd1-cf98-4653-9c89-e003b7ec9400",
-   "metadata": {},
+   "metadata": {
+    "jp-MarkdownHeadingCollapsed": true
+   },
    "source": [
     "## Exercise: Managing Customer Orders Optimized\n",
     "\n",
@@ -37,11 +39,99 @@
     "\n",
     "3. Instead of updating the inventory by subtracting 1 from the quantity of each product, only do it for  the products that were ordered (those in \"customer_orders\")."
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "74ac71c2",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "productsBV = [\"t-shirt\", \"mug\", \"hat\", \"book\", \"keychain\"] "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 23,
+   "id": "6f50f038",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'t-shirt': 10, 'mug': 5, 'hat': 15, 'book': 20, 'keychain': 25}\n"
+     ]
+    }
+   ],
+   "source": [
+    "inventoryBV={}\n",
+    "for pkeys in productsBV:\n",
+    "    inventoryBV[f\"{pkeys}\"]=int(input(f\"enter quantity of product available for {pkeys} in the inventory\"))\n",
+    "    \n",
+    "print(inventoryBV)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "id": "e5585b2e",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "customer order is: {'t-shirt', 'keychain', 'hat', 'book'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "customer_orders=set()\n",
+    "\n",
+    "customer_orders.add(input(\"enter the name of a product you want to order between t-shirt, mug, hat, book, keychain\"))\n",
+    "while input(\"do you want to order another product? (yes/no)\") == \"yes\":\n",
+    "    customer_orders.add(input(\"enter the name of a product you want to order between t-shirt, mug, hat, book, keychain\"))\n",
+    "else: print(f\"customer order is: {customer_orders}\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 24,
+   "id": "1e9abf9c",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'t-shirt': 9, 'mug': 5, 'hat': 14, 'book': 19, 'keychain': 24}"
+      ]
+     },
+     "execution_count": 24,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "for product, inventory in inventoryBV.items():\n",
+    "    if product in customer_orders:\n",
+    "        inventoryBV[product] = inventory - 1\n",
+    "\n",
+    "inventoryBV"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9290fbc3",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -55,7 +145,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,