Answer:
Consumer surplus is $15.99.
Explanation:
Melanie decided to buy a coat priced $79.95.
When she brought a coat to the sales clerk, she found out that it is on a 20% discount and she has to $15.99 less than the original price.
This means that her consumer surplus is at least $15.99.
The consumer surplus is the difference between the maximum price a consumer is willing to pay and the price it actually pays.
Melanie was willing to pay $79.95. But she actually paid $63.96. The difference between the two is $15.99.