public static void Main(string[] args)
{
_promotionEngine.AddPromotionRule(Apply3APromotion);
_promotionEngine.AddPromotionRule(ApplyBCPromotion);
_promotionEngine.AddPromotionRule(ApplyCDPromotion);
//Feel free to add new logic to be executed for promotion
//_promotionEngine.AddPromotionRule();
_productCatalog.AddProduct('A', 50);
_productCatalog.AddProduct('B', 30);
_productCatalog.AddProduct('C', 20);
_productCatalog.AddProduct('D', 15);
Checkout(new[] { 'A', 'B', 'C' });
Checkout(new[] { 'A', 'A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'B', 'C' });
Checkout(new[] { 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'B', 'C', 'D' });
}
