runable

lib/features/home/domain/usecases/calculate_total.dart

@@ -0,0 +1,8 @@
+import '../entities/cart_item.dart';
+
+/// Use case to calculate cart total
+class CalculateTotal {
+  double call(List<CartItem> items) {
+    return items.fold(0.0, (sum, item) => sum + item.total);
+  }
+}