(A)
Ave.profit = P(40)/40=505/40=12.625
(B)
MP(x)=30-0.6x
Marginal average profit =MP(40)=30-0.6×40=6
(C) Estimated average profit =MP(40)=6
(A)
Ave.profit = P(40)/40=505/40=12.625
(B)
MP(x)=30-0.6x
Marginal average profit =MP(40)=30-0.6×40=6
(C) Estimated average profit =MP(40)=6