สอบถามปัญหาคำสั่ง การหาค่าผลรวมไม่ได้ครับ รบกวนด้วยครับ

<?php 
	
	  	$count = 0;
		$sql = "select * from reqdetail where reqid = '".$_REQUEST['reqid']."'  order by reqdeid  ASC   "; 
		//echo $sql;
	  	$result = mysql_query($sql);
		while($photo = mysql_fetch_object($result)) { 
			$count++;
			($count % 2 != 0) ? $bgcolor = "#FFFFFF" : $bgcolor = "#F6F6F6";
		?>
/////////////แสดงผลรวม ครับ ///////////////////////
    <?  $sql = "SELECT SUM(reqdeprice) FROM reqdetail where reqid = '".$_REQUEST['reqid']."'  order by reqdeid  ASC   "; 
		//echo $sql;
	  	$result = mysql_query($sql);
		while($group = mysql_fetch_object($result)) { 
	echo 	$group->reqdeqty * $group->reqdeprice ;
		
		}
      ?>

select sum(reqdetail) as sum1, sum(reqdeqty) as sum2 from reqdetail where reqid = '$_REQUEST[reqid]'

select sum(reqdetail*reqdeqty) as result from reqdetail where reqid = '$_REQUEST[reqid]'

      <?php
// Make a MySQL Connection
 		$query = "select sum(reqdetail*reqdeqty) as result from reqdetail where reqid = '$_REQUEST[reqid]' "; 
 		$result = mysql_query($query);
		$data = mysql_fetch_object($result);
		echo  $data->result; 
?>     

select sum(reqdeqty*reqdeqty) as result from reqdetail where reqid = '$_REQUEST[reqid]'