public static void Main()
Console.WriteLine("Enter zone code: 12, 15, 18, 19, 23, 25 or 29");
code= Convert.ToInt16(Console.ReadLine());
Console.WriteLine("Enter duration of the call");
min = Convert.ToInt16(Console.ReadLine());
Console.WriteLine("The total cost of your call is " + cost);
Console.WriteLine("The total cost of your call is " + cost);
Console.WriteLine("The total cost of your call is " + cost);
Console.WriteLine("The total cost of your call is " + cost);
Console.WriteLine("The total cost of your call is " + cost);
Console.WriteLine("The total cost of your call is " + cost);