Answer:
(B) $30
Explanation:
We know that,
Producer surplus = Amount paid by the seller - cost of three lawns
$53 = Amount paid by the seller - ($10+ $12 + $15)
$53 = Amount paid by the seller - 37
So, the total price is = $53 + 37 = $90
For per customer it would be equal to
= (Total price) ÷ (number of customers)
= $90 ÷ 3
= $30
Basically it shows a difference between the market price and actual price received by the customer