src/models/ShopOrder.php
public function getCalcMoneyVat()
    {
        $money = new Money("", $this->currency_code);

        foreach ($this->shopOrderItems as $shopOrderItem) {
            $money = $money->add($shopOrderItem->moneyVat->multiply($shopOrderItem->quantity));
        }

        return $money;
    }
public function getCalcMoneyVat()
    {
        $money = new Money("", $this->currency_code);

        foreach ($this->shopOrderItems as $shopOrderItem) {
            $money = $money->add($shopOrderItem->moneyVat->multiply($shopOrderItem->quantity));
        }

        return $money;
    }
Налог

@return Money