Trade comissions

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

namespace _4._8.TradeComissions
{
    class Program
    {
        static void Main(string[] args)
        {
            var town = Console.ReadLine();
            var sell = double.Parse(Console.ReadLine());
            var comission = 0.0;

            if (town == "Sofia")
            {
                if (sell >= 0 && sell <= 500) comission = 0.05;
                else if (sell > 500 && sell <= 1000) comission = 0.07;
                else if (sell > 1000 && sell <= 10000) comission = 0.08;
                else if (sell > 10000) comission = 0.12;
            }

            else if (town == "Varna")
            {
                if (sell >= 0 && sell <= 500) comission = 0.045;
                else if (sell > 500 && sell <= 1000) comission = 0.075;
                else if (sell > 1000 && sell <= 10000) comission = 0.1;
                else if (sell > 10000) comission = 0.13;
            }

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