using System;

namespace fruitShop
{
    class Program
    {
        static void Main(string[] args)
        {
            //1.input :
            //fruit
            //weekDay
            //double quantity
            string fruit = Console.ReadLine();
            string dayOfTheWeek = Console.ReadLine();
            double quantity = double.Parse(Console.ReadLine());
            double price = 0;

            if(dayOfTheWeek.Equals("Monday") || dayOfTheWeek.Equals("Tuesday") || dayOfTheWeek.Equals("Wednesday") || dayOfTheWeek.Equals("Thursday") || dayOfTheWeek.Equals("Friday"))
            {
                switch (fruit)
                {
                    case "banana":
                        double priceF = quantity *(price + 2.50);
                        Console.WriteLine($"{priceF:F2}");
                        break;

                    case "apple":
                        double priceFr = quantity * (price + 1.20);
                        Console.WriteLine($"{priceFr:F2}");
                        break;

                    case "orange":
                        double priceFru = quantity * (price + 0.85);
                        Console.WriteLine($"{priceFru:F2}");
                        break;

                    case "grapefruit":
                        double priceFrui = quantity * (price + 1.45);
                        Console.WriteLine($"{priceFrui:F2}");
                        break;

                    case "kiwi":
                        double priceFruit = quantity * (price + 2.70);
                        Console.WriteLine($"{priceFruit:F2}");
                        break;

                    case "pineapple":
                        double priceFruits = quantity * (price + 5.50);
                        Console.WriteLine($"{priceFruits:F2}");
                        break;

                    case "grapes":
                        double priceFruitss = quantity * (price + 3.85);
                        Console.WriteLine($"{priceFruitss:F2}");
                        break;

                }
            }
            else if (dayOfTheWeek.Equals("Saturday") || dayOfTheWeek.Equals("Sunday"))
            {
                switch (fruit)
                {
                    case "banana":
                        double pr = quantity * (price + 2.70);
                        Console.WriteLine($"{pr:F2}");
                        break;

                    case "apple":
                        double pri = quantity * (price + 1.25);
                        Console.WriteLine($"{pri:F2}");
                        break;

                    case "orange":
                        double pric = quantity * (price + 0.90);
                        Console.WriteLine($"{pric:F2}");
                        break;

                    case "grapefruit":
                        double pricee = quantity * (price + 1.60);
                        Console.WriteLine($"{pricee:F2}");
                        break;

                    case "kiwi":
                        double priceeee = quantity * (price + 3.00);
                        Console.WriteLine($"{priceeee:F2}");
                        break;

                    case "pineapple":
                        double priceef = quantity * (price + 5.60);
                        Console.WriteLine($"{priceef:F2}");
                        break;

                    case "grapes":
                        double priceeff = quantity * (price + 4.20);
                        Console.WriteLine($"{priceeff:F2}");
                        break;
                }
            }
            else
            {
                Console.WriteLine("error");
            }

            //2.Пресмята цена според таблицата
            // плод  banana  apple  orange grapefruit  kiwi   pineapple  grapes
            //цена   2.50    1.20   0.85      1.45     2.70    5.50      3.85
            //Събота и неделя магазинът работи на по - високи цени:
            //плод  banana   apple  orange  grapefruit  kiwi   pineapple  grapes
            //цена   2.70    1.25   0.90       1.60     3.00     5.60      4.20

            //3.Резултатът да се отпечата закръглен с 2 цифри след десетичната точка. При
            //невалиден ден от седмицата или невалидно име на плод да се отпечата error!




        }
    }
}