Bagaimana membuat penjumlahan dalam looping???

<?php foreach ($DataBaki as $row) { ?>
<tr>
   <td><?php echo $row['kode_lokasi_gudang']; ?></td>
   <td><?php echo $row['kode_lokasi_toko']; ?></td>
   <td><?php echo $row['kode_dept']; ?></td>
   <td><?php echo "0"; ?></td>
   <td><?php echo $row['stock']; ?></td>
   <td><?php echo $row['berat']; ?></td>
   <td><?php echo $row['berat_baki']; ?></td>
   <td><?php echo $row['berat_bandrol']; ?></td>
   <td><input type="text" value="<?php echo $row['berat_total']; ?>"
    name="berat_total[]" class="form-control harga"></td>
   <td><input type=" text"  value="<?php echo $row['berat_timbang']; ?>"
    name="berat_timbang[]" class="form-control jumlah"></td>
    <td><input type="text"  value="<?php echo $row['selisih_timbang']; ?>"
    name="selisih_timbang[]" class="form-contr total"></td>
    <td>#</td>
</tr>

JSNYa

$(".perhitungan").keyup(function() {
            var harga = parseInt($(".harga").val())
            var jumlah = parseInt($(".jumlah").val())

            var total = harga * jumlah;
            $(".total").attr("value", total)

        });