//Total amount of completed orders
 public ActionResult TotalAmount()
 {
     if (!CommonServices.CheckUserSession())
     {
         return this.RedirectToAction("Login", "Login");
     }
     OrderServices orderService = new OrderServices();
     var GrandTotal = orderService.GrandTotal(UserSession.UserId);
     return PartialView("_GrandTotalPartial", GrandTotal);
 }