Your clothing store sells shirts and pants (we will skip creating a store object).
Shirts are identified by their size, price, color and brand.
Pants are identified by their waist, price, color and brand.
Every product in the store must be folded before a sale.
Pants are discountable by 50%. Shirts are not discountable.
Products must be sorted by price.

                        Test Cases
To keep the focus on inheritance, no units will be performed.