add ListView Summs Liter Price per Year

lib/pages/tanklist/widgets/my_list_tile_item.dart

@@ -15,9 +15,6 @@ class MyListTileItem extends StatelessWidget {
 
   Widget _myListItem(BuildContext context) {
     var textColor = Colors.orange.shade400;
-    var summePrice =
-        (double.parse(listItem.liters) * double.parse(listItem.pricePerLiter))
-            .toStringAsFixed(2);
     return Padding(
       padding: const EdgeInsets.all(10.0),
       child: Column(
@@ -75,7 +72,7 @@ class MyListTileItem extends StatelessWidget {
             children: [
               Icon(Icons.price_change),
               SizedBox(width: 10),
-              Text('$summePrice €', style: TextStyle(color: textColor, fontSize: 25)),
+              Text('${listItem.szSummePreis} €', style: TextStyle(color: textColor, fontSize: 25)),
             ],
           ),
           Divider(thickness: 1, color: Colors.black),