static void Main(string[] args)
{
Beverage beverage = new Espresso();
Console.WriteLine(beverage.Description + " $" + beverage.cost());
Beverage beverage2 = new DarkRoast();
beverage2 = new Mocha(beverage2);
beverage2 = new Mocha(beverage2);
beverage2 = new Whip(beverage2);
Console.WriteLine(beverage2.Description + " $" + beverage2.cost());
Beverage beverage3 = new HouseBlend();
beverage3 = new Mocha(beverage3);
beverage3 = new Whip(beverage3);
Console.WriteLine(beverage3.Description + " $" + beverage3.cost());
}