static void Main(string[] args)
{
IList <ISpecialPrice> specialPrices = new List <ISpecialPrice>
{
new SpecialPrice(2, 2, 45),
new SpecialPrice(1, 3, 130),
};
IList <Product> products = new List <Product>
{
new Product(1, "A", 50, specialPrices[1]),
new Product(2, "B", 30, specialPrices[0]),
new Product(3, "C", 10, null),
new Product(4, "D", 20, null),
};
ICheckSpecialPrice specialPrice = new CheckSpecialPrice();
ICheckout checkout = new Checkout(specialPrice);
checkout.ScanItem(products[1]);
checkout.ScanItem(products[1]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[0]);
checkout.ScanItem(products[1]);
var total = checkout.GetTotalPrice();
Console.WriteLine("TOTAL IS: " + total);
}