using System;
using System.Runtime.InteropServices.ComTypes;

namespace Aluminum_windows
{
    class Program
    {
        static void Main(string[] args)
        {
            double countWindows = double.Parse(Console.ReadLine());
            string windowsSize = Console.ReadLine();
            string shipmentMethod = Console.ReadLine();
            double price = 0;

            switch (windowsSize)
            {
                case "90X130":
                    double price = countWindows * 110;
                    if (countWindows >= 30)
                    {
                        price = price - (price * 0.5);
                    }
                    else if (countWindows >= 60)
                    {
                        price = price - (price * 0.8);
                    }
                    Console.WriteLine(price);
                    break;

                case "100X150":
                    double price = countWindows * 140;
                    if (countWindows >= 40)
                    {
                        price = price - (price * 0.6);
                            }
                    else if (countWindows >= 80)
                    {
                        price = price - (price * 1);
                    }
                    break;
                case "130X180":
                    double price = countWindows * 190;
                    if (countWindows >= 20)
                    {
                        price = price - (price * 0.7);
                    }
            else if (countWindows >= 50)
                    {
                        price = price - (price * 1.2);
                    }
                    break;
                case "200X300":
                    double price = countWindows * 250;
                    if (countWindows >= 25)
                    {
                        price = price - (price * 0.9);
                    }
                    else if (countWindows >= 50)
                    {
                        price = price - (price * 1.4);
                    }
                    break;
            }
            if (countWindows >= 99)
            {
                price = price * 0.4;
            }
            else if (countWindows <= 10)
                    {
                Console.WriteLine("Invalid Order");
            }
            Console.WriteLine($"{price:f2} BGN");
        }
    }
}