Suppose the total cost of producing T-shirts can be represented as TC = 50 + 2q. The marginal cost of the 5th T-shirt is

When a seller of one good requires a buyer to purchase other goods as part of the deal it is called

a. exclusive dealing b. a tying contract c. an interlocking directorate d. price discrimination

According to the following graph, at point B, The consumer's income is $1,200.

A. the consumer will receive more Y for each unit of X exchanged in the market than at point A. B. the rate at which the consumer is willing to substitute X for Y is greater than it is at point A. C. the consumer is willing to give up more Y in order to gain an extra unit of X than at point A. D. both a and b  E. all of the above