protected function _getCostSum()
    {
        if ($this->getAddSumType() == 'abs') {
            $oCur = \OxidEsales\Eshop\Core\Registry::getConfig()->getActShopCurrencyObject();
            $dPrice = $this->getAddSum() * $oCur->rate * $this->_getMultiplier();
        } else {
            $dPrice = $this->_dPrice / 100 * $this->getAddSum();
        }

        return $dPrice;
    }