Table 1 Number of Workers Number of Machines Output (corks produced per hour) Marginal Product of Labor Cost of Workers Cost of Machines Total Cost 1 2 5 2 2 10 3 2 20 4 2 35 5 2 55 6 2 70 7 2 80 Refer to Table 1 . Assume Gallo's currently employs 5 workers. What is the marginal product of labor when Gallo's adds a 6th worker?