public function retrieveTaxForClass(TaxClass $taxClass)
    {
        $locale = $this->shopLocation;
        $countryTax = $this->countryTaxRepository->findByLocaleAndTaxClassId($locale, $taxClass->getId());
        if (!$countryTax) {
            $countryTax = $this->countryTaxRepository->findByLocaleAndTaxClassId($locale, TaxClass::STANDARD_TAX_RATE);
            if (!$countryTax) {
                return 0;
            }
        }

        return $countryTax->getTax();
    }