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<!--Author:
    Date:
    File:   processOrder.php
    Purpose:Chapter 6 Exercise

-->

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

    <h1>SaveTheWorld: Process Order</h1>

    <?php
        $orderFile = fopen("order.txt","r");
        $order = fgets($orderFile);
        fclose($orderFile);

        list ($os, $numCopies) = split(":", $order);

        $subtotal = $numCopies * 35.00;
        $tax = $subtotal * 0.07;
        $shippingHandling = $numCopies * 1.25;
        $total = $subtotal + $tax + $shippingHandling;

        print("<p><strong>SaveThe World Software INVOICE:</strong></p>");
        print("<p>Operating System: $os<br />");
        print("Number of Copies Ordered: $numCopies<br />");
        print("Sub-total: $".number_format($subtotal, 2)."<br />");
        print("Sales tax: $".number_format($tax, 2)."<br />");
        print("Shipping and handling: $".number_format($shippingHandling, 2)."</p><hr />");
        print("<p><strong>TOTAL DUE: $".number_format($total, 2)."</strong></p><hr />");

    ?>

</body>
</html>