public function calculatePaymentAmountBasedOnBuyerDetails ($BillingAgreementDetails, 
            $orderAmountPreTaxAndShipping, $shippingType)
    {
        return $this->_shippingAndTaxCostHelper->calculateTotalAmount($BillingAgreementDetails, 
                $orderAmountPreTaxAndShipping, $shippingType);
    }