如何由于Jquery数据表中的列而为按总和值添加分组行？

Question

我想在链接https://datatables.net/extensions/rowgroup/examples/initialisation/customRow.html中应用该方法

我的代码：

dt2 = $("#beyanname2Table").DataTable(
                {
                    dom: 'Bfrtip',
                    buttons: ['excel', 'print'],
                    lengthChange: false,
                    searching: false,
                    paging: false,
                    order: [[1, 'asc']],
                    rowGroup: {
                        startRender: null,
                        endRender: function (rows, group) {
                            var salaryAvg = rows
                                .data()
                                .pluck(4)
                                .reduce(function (a, b) {
                                    return a + b.replace(/[^\d]/g, '') * 1;
                                }, 0);
                            salaryAvg = $.fn.dataTable.render.number(',', '.',
                                        0, '$').display(salaryAvg);



                            return $('<tr/>')
                                .append('<td colspan="3">Averages for ' + group 
                                 + '</td>')
                                .append('<td/>')
                                .append('<td>' + salaryAvg + '</td>');
                        },
                        dataSrc: 1
                    },

                    "ajax": {
                        "url": "/Müsavir/Musavir_RaporlamaSonuc",
                        "type": "GET",
                        "datatype": "json",
                    },

                    "columns": [
                        { "data": "Urun_SatirKod" },
                        { "data": "Urun_Gtip" },
                        { "data": "Urun_MaddeAd" },
                        { "data": "Oran" },
                        { "data": "Adet" },
                        { "data": "GBC_No" },
                        { "data": "GBC_Tarih" },
                        { "data": "UrunGumruk" },
                        { "data": "Com_SatirKod" },
                        { "data": "Com_Gtip" },
                        { "data": "Com_Adi" },
                        { "data": "Miktar" },
                        { "data": "Deger" },
                        { "data": "GB_No" },
                        { "data": "GB_Tarih" },
                        { "data": "Gumruk" },
                        { "data": "IthalVergiOran" },
                        { "data": "OdenecekTEV" },
                        { "data": "IhracKur" },
                        { "data": "OdenenTEV" },
                        { "data": "Anapara" },
                        { "data": "Faiz" },
                        { "data": "Fark" }

                    ],




                });

表格视图如图所示。我想建立一个基于“ Urun_Gtip”的组，并获得“ Adet”的总本金值。

enter image description here