Storing the ids and price in an array and using the end() function would be a solution in WordPress.
<?php
global $woocommerce;
$items = $woocommerce->cart->get_cart();
$ids = array();
foreach($items as $item => $values) {
$_product = $values['data']->post;
$ids[] = $_product->ID;
}
echo 'Last item = ' . end($ids);
$LastProductID = end($ids);
$LastProductPrice = wc_get_product( $LastProductID );
$LastProductPrice->get_price()
?>
