Answer:
producer surplus 14.2 dollars
Explanation:
The producer surplus will be the area above the marginal cost and the sales price:
Marginal cost: will be 0.8 regardles of the quantity
The demand line is build with the formula given: Qd = 20-5p
and then we stablish the price as state 2.4 for the first 8 units and 1 dollar from that point
As it met the demand curve in 15 units there will be sales for 15 units the first at 8 and the remainder 7 at 1 dollar
Producer surplus:
(2.4 - 0.8) x 8 + (1 - 0.8) * 7 = 14.2