public function getPriceInfo()
    {
        $aPrices = [];
        foreach ($this->_aList as $oPrice) {
            $sVat = ( string ) $oPrice->getVat();
            if (!isset($aPrices[$sVat])) {
                $aPrices[$sVat] = 0;
            }
            $aPrices[$sVat] += $oPrice->getBruttoPrice();
        }

        return $aPrices;
    }