Answer:
A. $1.85
Step-by-step explanation:
Producer surplus is the difference between how much an individual is willing to sell a good and how much they sell it at prevailing market prices.
Given that
Buyers are willing to pay = $2.95
Willing to sharpen 1st knife = $2.00
2nd knife = $2.25
3rd knife = $2.75
4th knife = $ 3.50
Therefore
Producer surplus = (2.95 - 2.00) + (2.95 - 2.25) + (2.95 - 2.75)
= 0.95 + 0.7 + 0.2
= $1.85
Note, the 4th knife is not included because what she's willing to collect is greater than what the buyer is willing to offer. So transaction doesnt take place.