private static void Main()
{
var basket = new ShoppingBasket();
basket.Add(new Product {
Name = "Book", Price = 10
});
basket.Add(new Product {
Name = "CD", Price = 14.5m
});
basket.Add(new Product {
Name = "Book", Price = 12
});
var cashier = new Cashier();
basket.Accept(cashier);
Console.WriteLine($"Customer has to pay {cashier.Total}.");
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.Read();
}