/// <summary> /// Gets additional handling fee /// </summary> /// <param name="cart">Shopping cart</param> /// <returns>The <see cref="Task"/> containing a additional handling fee</returns> public async Task <decimal> GetAdditionalHandlingFeeAsync(IList <ShoppingCartItem> cart) { return(await _orderTotalCalculationService.CalculatePaymentAdditionalFeeAsync(cart, _openPayPaymentSettings.AdditionalFee, _openPayPaymentSettings.AdditionalFeePercentage)); }