public function exec($calcId)
    {
        $result = [];
        /* collect additional data */
        $bonusPercent = Cfg::TEAM_BONUS_EU_PERCENT;
        $dwnlCompress = $this->daoBonDwnl->getByCalcId($calcId);
        $dwnlCurrent = $this->daoDwnl->get();
        /* create maps to access data */
        $mapDwnlById = $this->hlpDwnlTree->mapById($dwnlCompress, EBonDwnl::A_CUST_REF);
        $mapCustById = $this->hlpDwnlTree->mapById($dwnlCurrent, ECustomer::A_CUSTOMER_REF);
        /**
         * Go through all customers from compressed tree and calculate bonus.
         *
         * @var int $custId
         * @var EBonDwnl $custDwnl
         */
        foreach ($mapDwnlById as $custId => $custDwnl) {
            /** @var ECustomer $custData */
            $custData = $mapCustById[$custId];
            $custMlmId = $custData->getMlmId();
            $pv = $custDwnl->getPv();
            $parentId = $custDwnl->getParentRef();
            /** @var EBonDwnl $parentDwnl */
            $parentDwnl = $mapDwnlById[$parentId];
            /** @var ECustomer $parentData */
            $parentData = $mapCustById[$parentId];
            $parentMlmId = $parentData->getMlmId();
            $scheme = $this->hlpScheme->getSchemeByCustomer($parentData);
            if ($scheme == Cfg::SCHEMA_EU) {
                $pvParent = $parentDwnl->getPv();
                if ($pvParent > (Cfg::PV_QUALIFICATION_LEVEL_EU - Cfg::DEF_ZERO)) {
                    $bonus = $this->hlpFormat->roundBonus($pv * $bonusPercent);
                    if ($bonus > Cfg::DEF_ZERO) {
                        $entry = new DBonus();
                        $entry->setCustomerRef($parentId);
                        $entry->setDonatorRef($custId);
                        $entry->setValue($bonus);
                        $result[] = $entry;
                    }
                    $this->logger->debug("parent #$parentId (ref. #$parentMlmId) has '$bonus' as EU Team Bonus from downline customer #$custId (ref. #$custMlmId ).");
                } else {
                    $this->logger->debug("parent #$parentId (ref. #$parentMlmId) does not qualified t oget EU Team Bonus from downline customer #$custId (ref. #$custMlmId ).");
                }
            } else {
                $this->logger->debug("Parent #$parentId (ref. #$parentMlmId) has incompatible scheme '$scheme' for EU Team Bonus.");
            }
        }
        unset($mapCustById);
        unset($mapDwnlById);
        return $result;
    }