Answer:
$200
$200
$400
Step-by-step explanation:
Producer surplus is the difference between the price of a product and the least price the seller is willing to sell his product.
Producer surplus = price of the product - least price the producer is willing to sell his product
$450 - $400 = $50
Because there are four people , $50 × 4 = $200
Consumer surplus is the difference between the willingness to pay of a consumer and the price of the product.
My consumer surplus = $480 - $450 = $30
Ist friend = $450 - $450 = 0
2nd friend = $560 - $450 = $110
3rd friend = $510 - $450 = $60
Total surplus = $30 + $110 + $60 = $200
Total surplus is the sum of producer and consumer surplus.
$200 + $200 = $400
I hope my answer helps you