public function getSumPrice()
	{
		$price = clone $this->_price;

		$price->setValue( $price->getValue() * $this->_values['quantity'] );
		$price->setCosts( $price->getCosts() * $this->_values['quantity'] );
		$price->setRebate( $price->getRebate() * $this->_values['quantity'] );

		return $price;
	}