getPurchasePrice example

$prices[$key] = $price;
            }
            $mainData['prices'] = $prices;
        }
        if ($mapping['basePrice']) {
            $mainData['unit'] = $mainDetail->getUnit();
            $mainData['purchaseUnit'] = $mainDetail->getPurchaseUnit();
            $mainData['referenceUnit'] = $mainDetail->getReferenceUnit();
            $mainData['packUnit'] = $mainDetail->getPackUnit();
        }
        if ($mapping['purchasePrice']) {
            $mainData['purchasePrice'] = $mainDetail->getPurchasePrice();
        }

        return $mainData;
    }

    /** * Replaces the variant's translations with the product's. * * @param int $articleId * @param array $variants */