PHP janace

<?php

$employee = "Jan Ace Chan"; $designation = "Secretary";  $rph = 50; $hwpd = 8; $dwpm = 22; $grosspay;
$sss = 500; $ph = 200; $pagibig = 200; $tax = 1000; $totaldeduction; $netpay; $grosspay = $rph * $hwpd * $dwpm; $totaldeduction = $sss + $ph + $pagibig + $tax; $netpay = $grosspay - $totaldeduction;

echo "PAYROLL SYSTEM". "<br>". "<br>". "Employee Name: ". $employee. "<br>". "Designation: ". $designation. "<br>". "<br>". "Rate Per Hour: ". $rph. "<br>". "Hours Work Per Day: ". $hwpd. "<br>". "Days Work Per Month: ". $dwpm. "<br>". "Gross Pay: ". $grosspay. "<br>". "<br>". "===Deductions===". "<br>". "SSS: ". $sss. "<br>". "PH: ". $ph. "<br>". "PAGIBIG: ". $pagibig. "<br>". "TAX: ". $tax. "<br>". "TOTAL DEDUCTION: ". $totaldeduction. "<br>". "<br>" ." NET PAY: ". $netpay;
?>