Trade_Comissions

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)
        {
            double Sofia0_500 = 5.0 / 100;
            double Sofia500_1000 = 7.0 / 100;
            double Sofia1000_10000 = 8.0 / 100;
            double Sofia10000 = 12.0 / 100;
            double Varna0_500 = 4.5 / 100;
            double Varna500_1000 = 7.5 / 100;
            double Varna1000_10000 = 10.0 / 100;
            double Varna10000 = 13.0 / 100;
            double Plovdiv0_500 = 5.5 / 100;
            double Plovdiv500_1000 = 8.0 / 100;
            double Plovdiv1000_10000 = 12.0 / 100;
            double Plovdiv10000 = 14.5 / 100;
            string city = Console.ReadLine();
            double sales = double.Parse(Console.ReadLine());
            if ((city != "Sofia" && city != "Varna" && city != "Plovdiv") || sales < 0)
            {
                Console.WriteLine("error");
            }
            else
            {
                //sofia
                if (city == "Sofia" && sales >= 0 && sales <= 500)
                {
                    double result = sales * Sofia0_500;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Sofia" && sales > 500 && sales <= 1000)
                {
                    double result = sales * Sofia500_1000;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Sofia" && sales > 1000 && sales <= 10000)
                {
                    double result = sales * Sofia1000_10000;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Sofia" && sales > 10000)
                {
                    double result = sales * Sofia10000;
                    Console.WriteLine("{0:f2}", result);
                }
                //Varna
                if (city == "Varna" && sales >= 0 && sales <= 500)
                {
                    double result = sales * Varna0_500;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Varna" && sales > 500 && sales <= 1000)
                {
                    double result = sales * Varna500_1000;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Varna" && sales > 1000 && sales <= 10000)
                {
                    double result = sales * Varna1000_10000;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Varna" && sales > 10000)
                {
                    double result = sales * Varna10000;
                    Console.WriteLine("{0:f2}", result);
                }
                //Plovdiv
                if (city == "Plovdiv" && sales >= 0 && sales <= 500)
                {
                    double result = sales * Plovdiv0_500;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Plovdiv" && sales > 500 && sales <= 1000)
                {
                    double result = sales * Plovdiv500_1000;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Plovdiv" && sales > 1000 && sales <= 10000)
                {
                    double result = sales * Plovdiv1000_10000;
                    Console.WriteLine("{0:f2}", result);
                }
                else if (city == "Plovdiv" && sales > 10000)
                {
                    double result = sales * Plovdiv10000;
                    Console.WriteLine("{0:f2}", result);
                }
            }
        }
    }
}