Method formatItems

public static function formatItems(&$priceItems)
{
    $price = new PhocacartPrice();
    $priceItems['bruttoformat'] = $price->getPriceFormat($priceItems['brutto']);
    $priceItems['nettoformat'] = $price->getPriceFormat($priceItems['netto']);
    $priceItems['taxformat'] = $price->getPriceFormat($priceItems['tax']);
    return true;
}