string frut = Console.ReadLine();
string day = Console.ReadLine();
double broi = double.Parse(Console.ReadLine());
switch (day)
{
    case ("Monday"):
    case ("Tuesday"):
    case ("Wednesday"):
    case ("Thursday"):
    case ("Friday"):
        switch (frut)
        {
            case ("banana"):
                double sum = broi * 2.50;
                Console.WriteLine($"{sum:f2}");
                break;
            case ("apple"):
                double sum1 = broi * 1.20;
                Console.WriteLine($"{sum1:f2}");
                break;
            case ("orange"):
                double sum2 = broi * 0.85;
                Console.WriteLine($"{sum2:f2}");
                break;
            case ("grapefruit"):
                double sum3 = broi * 1.45;
                Console.WriteLine($"{sum3:f2}");
                break;
            case ("kiwi"):
                double sum4 = broi * 2.70;
                Console.WriteLine($"{sum4:f2}");
                break;
            case ("pineapple"):
                double sum5 = broi * 5.50;
                Console.WriteLine($"{sum5:f2}");
                break;
            case ("grapes"):
                double sum6 = broi * 3.85;
                Console.WriteLine($"{sum6:f2}");
                break;
            default:
                Console.WriteLine("error");
                break;
        }
        break;
    case ("Saturday"):
    case ("Sunday"):
        switch (frut)
        {
            case ("banana"):
                double sum = broi * 2.70;
                Console.WriteLine($"{sum:f2}");
                break;
            case ("apple"):
                double sum5 = broi * 1.25;
                Console.WriteLine($"{sum5:f2}");
                break;
            case ("orange"):
                double sum4 = broi * 0.90;
                Console.WriteLine($"{sum4:f2}");
                break;
            case ("grapefruit"):
                double sum3 = broi * 1.60;
                Console.WriteLine($"{sum3:f2}");
                break;
            case ("kiwi"):
                double sum6 = broi * 3.00;
                Console.WriteLine($"{sum6:f2}");
                break;
            case ("pineapple"):
                double sum2 = broi * 5.60;
                Console.WriteLine($"{sum2:f2}");
                break;
            case ("grapes"):
                double sum1 = broi * 4.20;
                Console.WriteLine($"{sum1:f2}");
                break;
            default:
                Console.WriteLine("error");
                break;
        }
        break;
    default:
        Console.WriteLine("error");
        break;
}