dd

using System;

namespace jjjj
{
    class Program
    {
        static void Main(string[] args)
        {
            string fruits = Console.ReadLine();
            string day = Console.ReadLine();
            double quantity = double.Parse(Console.ReadLine());
            double price = 0;
            if (day == "Monday" || day == "Tuesday" || day == "Wednesday" || day == "Thursday" || day == "Friday")
            {
                if (fruits == "banana")
                {
                    price = 2.50;
                }
                else if (fruits == "apple")
                {
                    price = 1.20;
                }
                else if (fruits == "orange")
                {
                    price = 0.85;
                }
                else if (fruits == "grapefrui")
                {
                    price = 1.45;
                }
                else if (fruits == "kiwi")
                {
                    price = 2.70;
                }
                else if (fruits == "pineaplle")
                {
                    price = 5.50;
                }
                else if (fruits == "grapes")
                {
                    price = 3.85;
                }
                Console.WriteLine($"{ quantity * price:f2}");
            }
            else if (day == "Sunday" || day == "Saturday")
            {
                if (fruits == "banana")
                {
                    price = 2.70;
                }
                else if (fruits == "apple")
                {
                    price = 1.25;
                }
                else if (fruits == "orange")
                {
                    price = 0.90;
                }
                else if (fruits == "grapefrui")
                {
                    price = 1.60;
                }
                else if (fruits == "kiwi")
                {
                    price = 3.00;
                }
                else if (fruits == "pineapple")
                {
                    price = 5.60;
                }
                else if (fruits == "grapes")
                {
                    price = 4.20;
                }
                Console.WriteLine($"{ quantity * price:f2}");
            }
            if (fruits != "banana" || fruits != "apple" || fruits != "orange" || fruits != "kiwi" || fruits != "grapes" || fruits != "pineaple" || fruits != "grapefrui")
            {
                if (day !="Monday" || day != "Tuesday" || day != "Wednesday" || day != "Tursday" || day != "Friday" || day != "Saturday" || day != "Sunday" )
                {
                    Console.WriteLine("error");
                }

            }




        }
    }
}