คำนวณค่า Sum ระหว่าง แถว จากข้อมูลที่ดึงมาจากตาราง

<table border="1">
  <tr>
    <td align="center">CODE</td>
    <td align="center">รายการ</td> 
    <td align="center" bgcolor="#66FF33">ค่าธรรมเนียม//ไปรษณีย์</td>
    <td align="center" bgcolor="#FFFF66">ค่าน้ำมัน</td>
    <td align="center" bgcolor="#0099FF">ค่าสาธารนูปโภค</td>
    <td align="center" bgcolor="#CC66CC">ค่าใช้จ่ายอื่นๆ</td>
    
  </tr>
  <?php do { ?>
    <tr>
    
      <td align="center"><?php echo $row_Recordset1['box1']; ?></td>
      <td align="center"><?php echo $row_Recordset1['box3']; ?></td>
      
      <? if ($row_Recordset1['box13']=='ค่าธรรมเนียม//ไปรษณีย์'){ ?>
      <td align="center" bgcolor="#66FF33"><?php echo $row_Recordset1['box6']; ?></td>
      <td align="center">0.00</td>
      <td align="center">0.00</td>
      <td align="center">0.00</td>
      <? ;  } else if ($row_Recordset1['box13']=='ค่าน้ำมัน'){ ?>
     
      <td align="center">0.00</td>
      <td align="center" bgcolor="#FFFF66"><?php echo $row_Recordset1['box6']; ?></td>
      <td align="center">0.00</td>
      <td align="center">0.00</td>
      <? ;  } else if ($row_Recordset1['box13']=='ค่าสาธารนูปโภค'){ ?>
     
      <td align="center">0.00</td>
      <td align="center">0.00</td> 
      <td align="center" bgcolor="#0099FF"><?php echo $row_Recordset1['box6']; ?></td>
      <td align="center">0.00</td>
      <? ;  } else if ($row_Recordset1['box13']=='ค่าใช้จ่ายอื่นๆ'){ ?>
     
      <td align="center">0.00</td>
      <td align="center">0.00</td>
      <td align="center">0.00</td> 
      <td align="center" bgcolor="#CC66CC"><?php echo $row_Recordset1['box6']; ?></td>
      <? ;  }  ?>
      
    </tr>
    <?php $x++;
	
	$total11 = $total11 + $row_Recordset1['box6'];
	$total22 = $total22 + $row_Recordset1['box6'];
	$total33 = $total33 + $row_Recordset1['box6'];
	$total44 = $total44 + $row_Recordset1['box6'];
	
   } while ($row_Recordset1 = mysql_fetch_assoc($Recordset1)); ?>
    
    <tr>
	  <td colspan="2" align="center">สรุป</td>
	  	 
      <td align="center" bgcolor="#FF0000"><font size="2"><b>
	  <?php echo $total11 = number_format($total11,2,'.',','); ?></font></td>
       <td align="center" bgcolor="#FF0000"><font size="2"><b>
	  <?php echo $total22 = number_format($total22,2,'.',','); ?></font></td>
       <td align="center" bgcolor="#FF0000"><font size="2"><b>
	  <?php echo $total33 = number_format($total33,2,'.',','); ?></font></td>  
       <td align="center" bgcolor="#FF0000"><font size="2"><b>
	  <?php echo $total44 = number_format($total44,2,'.',','); ?></font></td>       
     
      
      </td>
    </tr>
    
    
</table>