Get sum of the equal epf in data table

EPF value
123 100
123 10
123 700
143 40
143 30
145 40

EPF value
123 100
123 10
123 700
total 810

143 40
143 30
total 70

145 40
total 40

function medical_claim_list_tables() {

        medical_claim_list_table = js('#medical_claim_list_table').DataTable({
            "destroy": true,
            "processing": true,
            "serverSide": true,
            "scrollX": false,
            language: {
                searchPlaceholder: "EPF No"
            },
            "ajax": {
                "url": site_url + "/Finance_balance_log_c/get_finance_balance_log",
                "type": "POST"
//                "data": function (d) {
//                    return js.extend({}, d, {
//                        "date_from": js('#date_from').val(),
//                        "date_to": js('#date_to').val(),
//                        "claim_category": js('#claim_category').val(),
//                        "claim_type": js('#claim_type').val(),
//                        "posted": posted
//                    });
//                }
            },

            "columns": [
                {"data": "emp_no"},
                {"data": "name_short"},
                {"data": "claim_type"},
                {"data": "claim_type_balance"}
            ],

            "lengthMenu": [[99999999], ["All"]],

            "createdRow": function (data, type, full, meta) {
                if(full['emp_no'])
                if (data[3].replace(/[\$,]/g, '') * 1 > 150000) {
                    js('td', row).eq(5).addClass('highlight');
                }
            }