John Wilson, owner of a fast-food restaurant, calculated that he can sell 1,000 additional hamburgers per day by renting the more automated equipment at a cost of $100 per day. Alternatively, he calculated 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. Explain which of these two alternative ways of increasing the output should Mr. Wilson use?