<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
	<title>Product Cost Calculator</title>
	<style type="text/css" media="screen">
		.number { font-weight: bold;}
	</style>
</head>
<body>
<?php // Script 4.4 - handle_calc.php #3
/* This script takes values from calculator.html and performs 
total cost and monthly payment calculations. */

// Address error handling, if you want.

// Get the values from the $_POST array:
$price = $_POST['price'];
$quantity = $_POST['quantity'];
$discount = $_POST['discount'];
$tax = $_POST['tax'];
$shipping = $_POST['shipping'];
$payments = $_POST['payments'];

// Calculate the total:
$total = (($price * $quantity) + $shipping) - $discount;

// Determine the tax rate:
$taxrate = ($tax/100) + 1;

// Factor in the tax rate:
$total = $total * $taxrate;

// Calculate the monthly payments:
$monthly = $total / $payments;

// Apply the proper formatting:
$total = number_format ($total, 2);
$monthly = number_format ($monthly, 2);

// Print out the results:
print "<p>You have selected to purchase:<br />
<span class=\"number\">$quantity</span> widget(s) at <br />
$<span class=\"number\">$price</span> price each plus a <br />
$<span class=\"number\">$shipping</span> shipping cost and a <br />
<span class=\"number\">$tax</span> percent tax rate.<br />
After your $<span class=\"number\">$discount</span> discount, the total cost is 
$<span class=\"number\">$total</span>.<br />
Divided over <span class=\"number\">$payments</span> monthly payments, that would be $<span class=\"number\">$monthly</span> each.</p>";

?>
</body>
</html>