public static void Main()
double a, b, c, d, e, f, g;
Console.Write("How many buses do you want to order? ");
a = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("============================================================");
Console.WriteLine("The number of buses ordered is....................... {0}", a);
Console.WriteLine("The total due before taxes was......................$ {0:f2}", b);
Console.WriteLine("The amount paid in taxes is.........................$ {0:f2}", e);
Console.WriteLine("The discount was....................................$ {0:f2}", c);
Console.WriteLine("The total owed on the invoice is....................$ {0:f2}", f);
Console.WriteLine("============================================================");