Purpose:Chapter 8 Exercise

-->

<html>
<head>
	<title>SaveTheWorld Software</title>
	<link rel ="stylesheet" type="text/css" href="sample.css" >
</head>
<body>

	<h1>SaveTheWorld Software: Order Form</h1>

	<?php
		$os = $_POST['os'];
		$numCopies = $_POST['numCopies'];
		
		$subTotal = $numCopies * 35.75;
		$salesTax = $subTotal * 0.07;
		$shippingAndHandling = $numCopies * 1.00;
			
		if ($numCopies < 1)
			print("<p>ERROR: You must order at least 1 copy!</p>");
		
		if ($numCopies < 5)
			$shippingAndHandling = $numCopies * 3.50;
			
		else
			$shippingAndHandling = $numCopies * 0.75;
		
		
		$totalCost = $subTotal + $salesTax + $shippingAndHandling;

		print("YOUR ORDER: </p>");
		print("<p>Operating System: $os</p>");
		print("<p>Number of copies: $numCopies</p>");
		print("<p>Sub-total: $$subTotal<br />");
		print("<p>Sales tax: $$salesTax<br />");
		print("Shipping and handling: $$shippingAndHandling<br />");
		print("TOTAL: $$totalCost</p>");
		
	?>

</body>
</html>