The system should aggregate, count information in the place where it is located
Assign the duty of processing, aggregating, accumulating information to the N-th class (Information Expert), who has access to the information of the class with which you are going to carry out the above described operations
"Information Experts" can be no one class, but more
Into information-expert.ts we have 3 classes - 1) Calculator, 2) Check, 3) Product; Product has title && price; Check has amount of product; Calculator has a discount on some product;
Everytime