Select sales per User

Hello Team,

I want to select sales per base on the each user.

 

// Select servedBy base on the sales per user
 public ActionResult GetAdminReport( string sDate = null, string eDate = null)
        {
            

            ASPNETMASTERPOSTEntities db = new ASPNETMASTERPOSTEntities();

            var dataList = db.tblSales.Join(
                db.tblSalesDetails,
                sales => sales.SalesId,
                detail => detail.SalesId,
                (sales, detail) => new { Sales = sales, detail = detail });
            var modifiedData = dataList.GroupBy(x => new { x.Sales.OrderDate, x.detail.ProductId }).Select(x => new AdminReports

            {
                SalesDetailId = x.FirstOrDefault().detail.SalesDetailId,
                Quantity = x.Sum(s => s.detail.Quantity),
                ProductId = x.Key.ProductId,
                ProductName = x.FirstOrDefault().detail.tblProduct.ProductName,
                SalesId = x.FirstOrDefault().Sales.SalesId,
                stOrderDate = x.Key.OrderDate,
                TotalAmount = x.Sum(s => s.Sales.TotalAmount),
                SearvedById = x.FirstOrDefault().Sales.Createdby
            }).ToList();

            
           
            return Json(responseData, JsonRequestBehavior.AllowGet);
        }