Someone

<?
$a = 12;
$option1 = 138;
$option2 = 138;
$option3 = 168;
if(isset($_REQUEST['Submit'])){
$overseas=$_REQUEST['overseas'];
$destination=$_REQUEST['destination'];

if ($destination == "USA and Canada"){
    $total = $overseas * $a;
	$total2 = $option1 * $a;
	$total3 = $total2 - $total;
	echo  $total33;
} elseif($destination == "UK & Western Europe"){
    $total = $overseas * $a;
	$total2 = $option2 * $a;
	$total3 = $total2 - $total;
	echo  $total3;
	//echo "Uk and china";
	
}else {
	$total = $overseas * $a;
	$total2 = $option3 * $a;
	$total3 = $total2 - $total;
	echo  $total3;
	//echo "mix";
}
}
?>