21. When a book mentioned in subparagraph 1 of the first paragraph of section 14 is acquired, an institution may require that the accredited bookstore, which is obliged to do so, include on the bill for each title or the name of a collection sold at a standard price, the following information:(1) the foreign list price of the book or collection upon ordering or the net price;
(2) the markup added to the net price or tabulated statement used;
(3) the net unit price in Canadian currency as calculated in paragraph 2;
(4) the list price or the Canadian net price and the reduced price at discount sales referred to in section 16.