Answer:
1. $200
2. $255
3. $455
Step-by-step explanation:
Producer surplus is the difference between the least price a producer is willing to sell his product and the price of the good.
Producer surplus = price - least price of the product
$400 - $350 = $50
$50 × 4 = $200
Consumer surplus is the difference between the willingness to pay of a consumer and the price of the good.
Consumer surplus = highest amount a consumer would be willing to pay - price
Consumer surplus for me = $435 - $400 = $35
Consumer surplus for the first friend = $400 - $400 = 0
Consumer surplus for the second friend = $560 - $400 = $160
Consumer surplus for the third friend = $460 - $400 = $60
Total surplus = consumer surplus + producer surplus
Total consumer surplus = $60 + $160 + 0 + $35 = $255
Total surplus = $255 + $200 = $455
I hope my answer helps you