diff --git a/src/modules/timesheets/services/timesheets-query.service.ts b/src/modules/timesheets/services/timesheets-query.service.ts
index b7cde71..77fbd1b 100644
--- a/src/modules/timesheets/services/timesheets-query.service.ts
+++ b/src/modules/timesheets/services/timesheets-query.service.ts
@@ -74,7 +74,11 @@ export class TimesheetsQueryService {
                 bank_code: { select: { type: true } },
             },
             orderBy: { date: 'asc' },
-        });        
+        });     
+        
+        const to_num = (value: any) => value && typeof (value as any).toNumber === 'function'
+                            ? (value as any).toNumber()
+                            : Number(value);
 
         // data mapping
         const shifts: ShiftRow[] = raw_shifts.map(shift => ({
@@ -87,8 +91,7 @@ export class TimesheetsQueryService {
 
         const expenses: ExpenseRow[] = raw_expenses.map(expense => ({
             date: expense.date,
-            amount: typeof (expense.amount as any)?.to_num === 'function' ?
-                           (expense.amount as any).to_num() : Number(expense.amount),
+            amount: to_num(expense.amount),
             type: String(expense.bank_code?.type ?? '').toUpperCase(),
             is_approved: expense.is_approved ?? true,
         }));