TradeComissions

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

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

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

          else if (town == "varna")
            {
                if (sales >= 0 && sales <= 500) Console.WriteLine("{0:f2}", sales * 0.045);
                if (sales > 500 && sales <= 1000) Console.WriteLine("{0:f2}", sales * 0.075);
                if (sales > 1000 && sales < 10000) Console.WriteLine("{0:f2}", sales * 0.10);
                if (sales >= 10000) Console.WriteLine("{0:f2}", sales * 0.13);
                else Console.WriteLine("error");
            }

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

            else Console.WriteLine("error");

            }
        }
    }