Fix: Changed formula of Service Charge to update the new way of keeping accounts

Fix: Changed the limit of ESI in line with govt. regulations

overlord/src/app/employee-benefits/employee-benefits.component.ts

@@ -150,7 +150,7 @@ export class EmployeeBenefitsComponent implements OnInit, AfterViewInit {
   }
 
   getEsi(grossSalary, daysWorked, daysInMonth) {
-    const limit = 15000,
+    const limit = 21000,
       employeeRate = 0.0175,
       employerRate = 0.0475,
       employee = (grossSalary > limit) ? 0 : Math.ceil(employeeRate * grossSalary * daysWorked / daysInMonth),