Aggregations In FetchXML using Javascript

    var FORM_TYPE_CREATE = 2;
    var formType = Xrm.Page.ui.getFormType();
    if (formType == FORM_TYPE_CREATE) {
        var guId = Xrm.Page.data.entity.getId();

        var fetch = "<fetch version='1.0' output-format='xml-platform' mapping='logical' aggregate='true'>" +
       "<entity name='new_paymentmodeselection'>" +
       "<attribute name='new_fees' alias='ChequeSales_sum' aggregate='sum' />" +
       "<filter type='and'>" +
         "<condition attribute='new_paymentmodeid' operator='eq' uitype='new_importdata' value='" + guId + "' />" +
       "</filter>" +
       "</entity>" +
       "</fetch>";
        var Cheque = XrmServiceToolkit.Soap.Fetch(fetch);
        if (Cheque.length > 0) {
            var totalFee ;
            if (typeof Cheque[0].attributes.ChequeSales_sum != "undefined") {

                totalFee = Cheque[0].attributes.ChequeSales_sum.value;
            }
            //var totalAmount = parseFloat(totalFee);
            Xrm.Page.getAttribute("new_chequesalegrandtotal").setValue(totalFee);
        }

    }//////////////////////////////////////////////////////////////////////Groupby Examples in Fetchxm/////////////

 var fetch = "<fetch version='1.0' output-format='xml-platform' mapping='logical' aggregate='true' >" +
             "<entity name='new_payments'>" +
                "<attribute name='new_fees' alias='fee_sum' aggregate='sum' />" +
               "<attribute name='new_paymentmodes' alias='paymentmodes' groupby='true' />" +
                "</entity>" +
           "</fetch>";


var Bankspay = parseInt(typeof totalFee[0].attributes.new_bank != "undefined" ? totalFee[0].attributes.new_bank.value : 0);
    var totalCash = parseInt(typeof totalFee[0].attributes.new_cashpayments != "undefined" ? totalFee[0].attributes.new_cashpayments.value : 0);