Mr. Cravens' company, The Bald Spot, produces toupees. At current output they produce 15 toupees per hour. The Bald Spot then hires one additional worker. Once the worker is added, output increases to 25 toupees per hour. What is the marginal product? Group of answer choices 10 toupees per hour 15 toupees per hour 25 toupees per hour 40 toupees per hour