[RESOLVED] decimal

[slimjim]

How would I convert this so that the result has a decimal for dollar amount.

Right now it is this :
6x.01+1.00=7

I want it so that it is like this :
6x.01+1.00=$7.00

<? 
if($_POST) // see if user submitted it // 
{ 
$fee="1.00";
 // multoply them together plus fee// 
 $retval=$_POST['val1'] * $_POST['val2'] + $fee; 
} 
?> 
<form action="<?=$PHP_SELF?>" method="post"> 
<? 

$result=(isset($retval))?$retval:""; 
$v1=(isset($_POST['val1'])?$_POST['val1']:""); 

if(isset($_POST['val2'])){ 
 $v2=$_POST['val2']; 
}else{ 
 $v2=""; 
} 
?> 
input 1:&nbsp;<input type=text name=val1 value="<?=$v1?>" size=10><br> 
input 2:&nbsp;<input type=text name=val2 value="<?=$v2?>" size=10><br>
Fee:&nbsp;&nbsp;$<?=$fee?><br>
<input type=hidden name=fee value="<?=$fee?>"><br> 
Total In Dollar Amount:&nbsp;&nbsp;[ $ <b><?=$result?></b> ]<br>
<input type=hidden name=result value="<?=$result?>"><br> 
<input type=submit value=" Calculate "> 
</form> 

[slimjim]

Solved
$result2 = number_format($retval, 2);