public double CalculateDiscountAmount(DiscountCard card, double purchaseAmount) { var settings = GetSettings(card); if (settings == null) { return(purchaseAmount); } else { return(purchaseAmount * settings.Percentage / 100.00); } }
public double GetDiscountPercentage(DiscountCard card) { var settings = GetSettings(card); return(settings?.Percentage ?? 0); }