如何将<td>值计算到一个输入字段中？

I am having table with two td values

  <td><?php echo $row['remun'];?></td>
  <td><?php echo $row['lum'];?></td>

it return some values based on row value

for example
Ist column   2nd column
100              150
200              150
300              150

<input type="text" name="grand_total" id="grand_total" />

javascript

   <script>    
  $('#dynamic-table tr').each(function() {
   if (!this.rowIndex) return; // skip first row
   var customerId = this.cells[4].innerHTML;
   alert(customerId);
  $("#grand_total").val(customerId);
 });

i get only first row value but i want sum of all fields.

But you can easily manage it from your php loop as well as. definitely, you are using for loop to printing record in table.

<?php 
   $grand_total=0;          
  foreach($a as $row){ 
  $grand_total=$grand_total+$row['remun']+$row['lum'];
   ?>
 <td class="remun"><?php echo $row['remun'];?></td>
 <td class="lum"><?php echo $row['lum'];?></td>
 <?php }?>
 <td class="total"><?php echo $grand_total;?></td>

But if you want to do it with js then please follow the below once. Please add some class in your like below.

 <td class="remun"><?php echo $row['remun'];?></td>
 <td class="lum"><?php echo $row['lum'];?></td>

Now user below jquery code for the Sum of both.

var t1=0;
var t2=0;
var t3=0;
$('.remun').each(function(){
 t1=t1+parseInt($(this).html());
});
$('.lum').each(function(){
 t2=t2+parseInt($(this).html());
});
t3=t1+t2;
alert(t3);