using System;

namespace _3
{
    class Program
    {
        static void Main(string[] args)
        {
            var fruit = Console.ReadLine();
            var size = Console.ReadLine();
            var numberOfSets = int.Parse(Console.ReadLine());

            var priceForSet = 0.0;


            if(fruit == "Watermelon")
            {
                if (size == "small")
                {
                    priceForSet = 2 * 56.0;
                }
                else
                {
                    priceForSet = 5 * 28.70;
                }
            }
            else if(fruit == "Mango")
            {
                if (size == "small")
                {
                    priceForSet = 2 * 36.66;
                }
                else
                {
                    priceForSet = 5 * 19.60;
                }
            }
            else if(fruit == "Pineapple")
            {
                if (size == "small")
                {
                    priceForSet = 2 * 42.10;
                }
                else
                {
                    priceForSet = 5 * 24.80;
                }
            }
            else if(fruit == "Raspberry")
            {
                if (size == "small")
                {
                    priceForSet = 2 * 20.0;
                }
                else
                {
                    priceForSet = 5 * 15.20;
                }
            }

            var discount = 0.0;

            if(priceForSet * numberOfSets >= 400 && priceForSet * numberOfSets <= 1000)
            {
                discount = 15.0 * priceForSet * numberOfSets / 100.0;

            }
            else if(priceForSet * numberOfSets > 1000)
            {
                discount = priceForSet * numberOfSets / 2.0;
            }


            Console.WriteLine("{0:0.00} lv.", priceForSet * numberOfSets - discount);



        }
    }
}