public static void Main()
string grad = Console.ReadLine();
double suma = double.Parse(Console.ReadLine());
if ( suma >= 0 && suma <= 500 )
Console.WriteLine("{0:F2}",comm);
else if ( suma >= 500 && suma <= 1000 )
Console.WriteLine("{0:F2}",comm);
else if ( suma >=1000 && suma <= 10000 )
Console.WriteLine("{0:F2}",comm);
Console.WriteLine("{0:F2}",comm);
Console.WriteLine("error");
else if ( grad == "Varna" )
if ( suma >= 0 && suma <= 500 )
Console.WriteLine("{0:F2}",comm);
else if ( suma >= 500 && suma <= 1000 )
Console.WriteLine("{0:F2}",comm);
else if ( suma >=1000 && suma <= 10000 )
Console.WriteLine("{0:F2}",comm);
Console.WriteLine("{0:F2}",comm);
Console.WriteLine("error");
else if ( grad == "Plovdiv" )
if ( suma >= 0 && suma <= 500 )
Console.WriteLine("{0:F2}",comm);
else if ( suma >= 500 && suma <= 1000 )
Console.WriteLine("{0:F2}",comm);
else if ( suma >=1000 && suma <= 10000 )
Console.WriteLine("{0:F2}",comm);
Console.WriteLine("{0:F2}",comm);
Console.WriteLine("error");
Console.WriteLine("error");