static void Main(string[] args)
{
NationalTax nt = new NationalTax();
Book b = new Book(nt)
{
Price = 100
};
ImportedTax it = new ImportedTax();
Magazine m = new Magazine(it)
{
Price = 10
};
Console.WriteLine($" Book Tax: {b.CalculateTax()} \t Magazine Tax {m.CalculateTax()} ");
Console.Read();
}
