diff --git a/Controllers/building_four.Controller.cs b/Controllers/building_four.Controller.cs
index 82a0d36..e03baf7 100644
--- a/Controllers/building_four.Controller.cs
+++ b/Controllers/building_four.Controller.cs
@@ -225,10 +225,11 @@ namespace rmutr_report.Controllers
                 }
             }
 
-            foreach (var expense in building_fours.expense_category)
+            if (building_fours.expense_category!=null)
             {
-                if (expense!=null)
+                foreach (var expense in building_fours.expense_category)
                 {
+                
                     var a = building_fours.expense_category.Where(d => d.amount == d.amount)
                         .Sum(o => o.amount);
                     building_fours.total_expense = a;