As a small business owner in Omaha, Nebraska, Larry sells breakfast burritos from his food truck. Larry wants to know how many breakfast burritos he has to sell weekly in order to make a profit. Larry learns that he will maximize profit on the sale of his burritos when marginal revenue (MR; the extra money brought in by selling one more burrito) equals _________. a. the price b. the marginal cost c. the cost d. the sunk cost