/**
* Price with VAT every time
* @return string
*/
public function formatVat()
{
$number = $this->lastChange->getNumber();
if ($this->tax->isVatOn()) {
return $this->lastChange->render($number);
}
$this->tax->vatOn();
$number = $this->lastChange->render($this->tax->taxation($number));
$this->tax->vatOff();
return $number;
}