What would be the impact of the following events on the (1) marginal cost, (2) fixed cost and (3) average total cost of a shirt that is made in China and purchased at a local department store?

a) Higher tariffs on shirts imported from China

b) An increase in wages for store associates

c) Higher rent payments by the department store to the landlord

d) Advanced technologies for ringing up sales virtually allow stores to cut staffing levels