private void createRule(int percent, List <Product> productList, StatusProduct status)
{
var rule = new DiscountRule(percent, productList, status);
this.cost += rule.discount();
this.rules.Add(rule);
}
public DiscountRule(int discountPersent, List <Product> items, StatusProduct status)
{
this.statusProduct = status;
this.discountPersent = discountPersent;
this.items = items;
}