Answer:
a. $300
b. $100
c. $400
Explanation:
The computation of the producer and consumer surplus is shown below:
a. Producer surplus = Market price or agreed price - Actual amount to sell the goods
= $700 - $400
= $300
b. And, the consumer surplus = Willing to pay - Market price or agreed price
= $800 - $700
= $100
c. The combined consumer and the producer surplus is
= $300 + $100
= $400