Answer:
So His producer surplus is $64
Explanation:
Given:
As we know that, manufacturers or producer surplus is the difference between the market price and the price that he is willing to teach, so we have:
(40 - 10) + (40 - 18) + (40-28) + (40-40)
<=> 30 + 22 + 12 + 0 = 64
So His producer surplus is $64