/// <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));
}