John Wilson, the owner of a fast-food restaurant, estimated that he can sell 1,000 additional hamburgers per day by renting more automated equipment at a cost of $100 per day. Alternatively, he estimated that he could sell an extra 1,200 hamburgers per day by keeping the restaurant open for two more hours per day at a cost of $50 per hour. Which of these two alternative ways of increasing output should Mr. Wilson use?