processorder.php
<html>
<head>
<title>Bob's Auto Parts - Order Results</title>
</head>
<body>
<h1>Bob's Auto Parts</h1>
<h2>Order Results</h2>
<?php
echo '<p>Order processed at ';
echo date('H:i, jS F');
echo '</p>';
echo '<p>Your order is as follows: </p>';
echo $tireqty.' tires<br />';
echo $oilqty.' bottles of oil<br />';
echo $sparkqty.' spark plugs<br />';
$totalqty = 0;
$totalamount = 0.00;
$totalqty = 0;
$totalqty = $tireqty + $oilqty + $sparkqty;
echo 'Items ordered: '.$totalqty.'<br />';
$totalamount = 0.00;
define('TIREPRICE', 100);
define('OILPRICE', 10);
define('SPARKPRICE', 4);
$totalamount = $tireqty * TIREPRICE
+ $oilqty * OILPRICE
+ $sparkqty * SPARKPRICE;
echo 'Subtotal: $'.number_format($totalamount,2).'<br />';
$taxrate = 0.10;
$totalamount = $totalamount * (1 + $taxrate);
echo 'Total including tax: $'.number_format($totalamount,2).'<br />';
?>
</body>
</html>