diff --git a/lib/src/json_table_column.dart b/lib/src/json_table_column.dart
index 9fba9a1..58369f6 100644
--- a/lib/src/json_table_column.dart
+++ b/lib/src/json_table_column.dart
@@ -16,4 +16,12 @@ class JsonTableColumn {
     label = json['label'];
     defaultValue = json['defaultValue'];
   }
+
+ JsonTableColumn.fromJson(Map<String, dynamic> json) {
+   field = json['field'];
+   final amountSpent = field.fold(0, (acc, cur) => acc + cur.availableBudget);
+    setState(() {
+      total += amountSpent;
+    });
+ }
 }