The equilibrium value of the marginal product of labor for web database programmers is $160 per hour. Sandra is the second worker hired at Lunar Logic, and her value of marginal product is $400 per hour. If the market for web services is perfectly competitive and the labor market for web programmers is perfectly competitive, then the marginal productivity theory of income distribution says Sandra should be paid: less than $160 per hour. $160 per hour. more than $160 per hour and less than $400 per hour. $400 per hour