<?php $prices = array(5.95, 10.75, 11.25); printf("<p>%s</p>\n", implode(', ', $prices)); array_unshift($prices, 10.85); printf("<p>%s</p>\n", implode(', ', $prices)); array_unshift($prices, 3.35, 17.95); printf("<p>%s</p>\n", implode(', ', $prices)); ?>