Изменение цены [[miniShop2]]

<?php
if ($modx->event->name == 'msOnGetProductPrice') {
    $values = & $modx->event->returnedValues;
    if($values['weight']){
    	$price = $values['price'];
    	$weight = $values['weight'];
    	$new_price = round($price * $weight, 1);
    	if (!empty($new_price)) {
    		$values['price'] = $new_price;
    	}
    }
}