TradeComission

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

namespace _08_Trade_Commissions
{
    class tradeCommissions
    {
        static void Main(string[] args)
        {

            double s = double.Parse(Console.ReadLine());
            string town = Console.ReadLine().ToLower();
            double komissionna = -1;

            if ((s>=0) && (s <= 500) )
            {
                if (town == "Sofia")
                {
                   komissionna = 5 / 100 ;
                }
                else if (town == "Varna")
                {
                    komissionna = 4.5 / 100;
                }
                else if (town == "Plovdiv")
                {
                    komissionna = 5.5 / 100;
                }
            }
            else if ((s > 500) && (s <= 1000))
            {
                if (town == "Sofia")
                {
                    komissionna = 7 / 100;
                }
                else if (town == "Varna")
                {
                    komissionna = 7.5 / 100;
                }
                else if (town == "Plovdiv")
                {
                    komissionna = 8 / 100 ;
                }
            }
            else if ((s > 100) && (s <= 10000))
            {
                if (town == "Sofia")
                {
                    komissionna = 8 / 100;
                }
                else if (town == "Varna")
                {
                    komissionna = 10 / 100;
                }
                else if (town == "Plovdiv")
                {
                   komissionna = 12 / 100;
                }
            }
            else if (s > 10000)
            {
                if (town == "Sofia")
                {
                    komissionna = 12 / 100 ;
                }
                else if (town == "Varna")
                {
                    komissionna = 13 / 100;
                }
                else if (town == "Plovdiv")
                {
                    komissionna = 14.5 / 100;
                }
            }
            if (komissionna>=0)
            {
                Console.WriteLine("{0:f2}", komissionna*s);
            }

            else
            {
                Console.WriteLine("error");
            }
        }
    }
}