<?php
$str = 'Your order total is: ';
$order = 20;
$additional = 5;
$orderTotal = 0;
$complete = false;
//add additional items to order
$orderTotal = $order + $additional;
//if order is equal to 25
if ($orderTotal >= 25) {
//change $complete to true to indicate the order is complete
$complete = true;
//display the $str and add the orderTotal
echo $str . $orderTotal;
}