-Kevin Owns a Personal Training Gym in Darwin

-Kevin owns a personal training gym in Darwin. He charges $41 per session. The above table shows the marginal product of trainers in Kevin's gym. If Kevin hires three trainers, the value of marginal product of the third trainer equals

A) $123.
B) 2 clients.
C) $82.
D) $369.
E) 9 clients.