static void Main(string[] args)
{
Tax21 ch = new Tax21();
Console.WriteLine("T-shirt");
ch.CalculateTax(25, 2);
Tax6 tax6 = new Tax6();
Console.WriteLine("Book");
tax6.CalculateTax(25, 2);
}
static void Main(string[] args)
{
Tax21 total21 = new Tax21();
Console.Write("2 T-Shirts= ");
total21.CalculateTax(25, 2);
Console.WriteLine("-----------------------");
Tax6 total6 = new Tax6();
Console.Write("2 Boeken= ");
total6.CalculateTax(25, 2);
Console.ReadLine();
}