A manager of a firm with market power faces the marginal revenue product and average revenue product curves shown below. The firm incurs weekly fixed costs of $1,800. The firm employs a single variable input, labor, which costs $600 per worker each week.

$ 1,400 1,200 1,000 MRP and ARP (dollars) 800 600 ARP 400 200 MRP -L 0 N 4 6 8 10 12 14 16 18 20 Labor (workers per week)