Не мога да открия грешката. Съмнявам се в процентите. Благодаря предварително.

            double whiskyPrice = Double.Parse(Console.ReadLine());
            double beerQuantity = Double.Parse(Console.ReadLine());
            double wineQuantity = Double.Parse(Console.ReadLine());
            double brendyQuantity = Double.Parse(Console.ReadLine());
            double whiskyQuantity = Double.Parse(Console.ReadLine());
            
            double brendyPrice = whiskyPrice/2;
            double winePrice = (brendyPrice-(40/100 * brendyPrice));
            double beerPrice = (brendyPrice-(80/100 * brendyPrice));

            double TotalbrendyPrice = brendyPrice * brendyQuantity;
            double TotalwinePrice = winePrice * wineQuantity;
            double TotalbeerPrice = beerPrice * beerQuantity;
            double TotalwhiskyPrice = whiskyQuantity * whiskyPrice;

            double totalPrice = TotalwhiskyPrice + TotalbeerPrice + TotalwinePrice + TotalbrendyPrice;

            Console.WriteLine($"{totalPrice:F2}");