diff --git a/app.py b/app.py
index 75b5cd2..09ef2bb 100644
--- a/app.py
+++ b/app.py
@@ -35,15 +35,32 @@ def unhandled_exception():
     'hammer': 1
 }
 
+product_mapping = {
+    3: "wrench",
+    4: "nails",
+    5: "hammer"
+}
+
 def process_order(cart):
     global Inventory
-    tempInventory = Inventory
-    for item in cart:
-        if Inventory[item['id']] <= 0:
-            raise Exception("Not enough inventory for " + item['id'])
+    tempInventory = Inventory.copy()
+    quantities = cart["quantities"]
+
+    for item in cart["items"]:
+        product_id = item['id']
+        product_name = product_mapping.get(product_id)
+
+        if not product_name or product_name not in tempInventory:
+            raise Exception("Product not found: " + str(product_id))
+
+        requested_quantity = int(quantities.get(str(product_id), 0))
+
+        if tempInventory[product_name] < requested_quantity:
+            raise Exception("Not enough inventory for " + product_name)
         else:
-            tempInventory[item['id']] -= 1
-            print 'Success: ' + item['id'] + ' was purchased, remaining stock is ' + str(tempInventory[item['id']])
+            tempInventory[product_name] -= requested_quantity
+            print(f"Success: {requested_quantity} of {product_name} were purchased, remaining stock is {tempInventory[product_name]}")
+
     Inventory = tempInventory 
 
 @app.before_request
@@ -65,11 +82,9 @@ def sentry_event_context():
 
 @app.route('/checkout', methods=['POST'])
 def checkout():
-
     order = json.loads(request.data)
-    print "Processing order for: " + order["email"]
-    cart = order["cart"]
+    print("Processing order for: " + order.get("email", "Unknown"))
     
-    process_order(cart)
+    process_order(order)
 
     return 'Success'