using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TRadeComissions
{
    class Program
    {
        static void Main(string[] args)
        {
            var town = Console.ReadLine().ToLower();
            double sales = double.Parse(Console.ReadLine());
            double comission = -1;

            if (town == "sofia")
            {
                if (0 <= sales && sales <= 500) comission = 0.05 * sales;
                else if (500 < sales && sales <= 1000) comission = 0.07 * sales;
                else if (1000 < sales && sales <= 10000) comission = 0.08 * sales;
                else if (sales > 10000) comission = 0.12 * sales;
                else
                {
                    Console.WriteLine("error");
                }
                Console.WriteLine("{0:f2}", comission);


            }
            else if (town == "varna")
            {
                if (0 <= sales && sales <= 500) comission = 0.045 * sales;
                else if (500 < sales && sales <= 1000) comission = 0.075 * sales;
                else if (1000 < sales && sales <= 10000) comission = 0.1 * sales;
                else if (sales > 10000) comission = 0.13 * sales;
                else
                {
                    Console.WriteLine("error");
                }
                Console.WriteLine("{0:f2}", comission);

            }
            else if (town == "plovdiv")
            {
                if (0 <= sales && sales <= 500) comission = 0.055 * sales;
                else if (500 < sales && sales <= 1000) comission = 0.08 * sales;
                else if (1000 < sales && sales <= 10000) comission = 0.12 * sales;
                else if (sales > 10000) comission = 0.145 * sales;
                else{
                    Console.WriteLine("error");
                }
                Console.WriteLine("{0:f2}", comission);
            }else
            {
                Console.WriteLine("error");
            }
        }
    }
}