Harold Brown Runs a Company That Sells Encyclopedia Sets for $250

Multiple Choice

Harold Brown runs a company that sells encyclopedia sets for $250 each. When he employs 10 workers, they can sell 60 sets per week, while only 54 sets are sold when 9 workers are employed. What is the weekly marginal revenue product of the tenth worker?

A) $250
B) $1,250
C) $1,500
D) $15,000