echo "<tr>
        <td><input type='text'  name='sl_p_codes[]' id='p_code' value='{$data['p_code']}' ></td>
        <td><input type='text'  name='sl_products[]' id='qty' value='{$data['p_name']}' ></td>
        <td><input type='text' id='product_qty' name='sl_p_qty[]'  id='qt' value='01' size='2'></td>
        <td><input type='hidden'  name='sl_unit_cost[]'  id='product_unit_price'></td>
        <td><input type='text' id='product_total_cost' readonly name='sl_price[]' id='qty' value='{$data['p_price']}' ></td>
        <td class='center'><a href='#'  onclick='delrow(this);' class='btn btn-danger'>X</a></td>
    </tr>";

$(document).find('td').each(function(i,v){
    if($(this).find('input').attr('id')=='product_total_cost')
        console.log($(this).find('input').val());
});