update carton and cargo type

lib/pages/rates/discount_by weight_list.dart

@@ -11,30 +11,20 @@ import 'package:provider/provider.dart';
 import 'model/shipment_rate_model.dart';
 
 class DiscountByWeightList extends StatefulWidget {
-  const DiscountByWeightList({Key? key}) : super(key: key);
+  const DiscountByWeightList({super.key});
   @override
   _DiscountByWeightListState createState() => _DiscountByWeightListState();
 }
 
 class _DiscountByWeightListState extends State<DiscountByWeightList> {
-  bool _isLoading = false;
-
-  @override
-  void initState() {
-    super.initState();
-  }
-
-  @override
-  void dispose() {
-    super.dispose();
-  }
+  bool isLoading = false;
 
   @override
   Widget build(BuildContext context) {
     var shipmentRateModel = Provider.of<ShipmentRateModel>(context);
 
     return LocalProgress(
-      inAsyncCall: _isLoading,
+      inAsyncCall: isLoading,
       child: Scaffold(
           appBar: LocalAppBar(labelKey: 'rate.discount_by_weight'),
           floatingActionButton: FloatingActionButton.extended(
@@ -64,7 +54,7 @@ class _DiscountByWeightListState extends State<DiscountByWeightList> {
                     child: Container(
                       child: _row(
                           "${discountByWeight.weight.toStringAsFixed(2)} lb",
-                          "\$ " + discountByWeight.discount.toString()),
+                          "\$ ${discountByWeight.discount}"),
                     ),
                   );
                 }),
@@ -85,7 +75,7 @@ class _DiscountByWeightListState extends State<DiscountByWeightList> {
                 Padding(
                   padding: const EdgeInsets.only(bottom: 3.0),
                   child: Text(
-                    '$price',
+                    price,
                     style: TextStyle(color: primaryColor, fontSize: 14),
                   ),
                 ),