Many brand-name producers of paper towels sell the product in packages of 6 or 8 rolls, but will not sell an individual role by itself. Similarly, many pizzerias will refuse to sell a single slice of pizza and require customers to purchase a entire pan of B sells. (Question A) What type of non-linear pricing strategy do the above scenarios describe? (Question B) Explain how the scenarios mentioned above can simultaneously extract consumer surplus and increase firm profits, yet still maintain customer sales