Answer:
$1
Step-by-step explanation:
The consumer surplus is the amount which shows a difference between the willing to pay and the market price or required amount to pay
In mathematically,
The consumer surplus = Willing to pay - Market price or required amount to pay
= $3.15 - $2.15
= $1
This $1 reflects the gained amount of consumer surplus
Simply we applied the above formula so that the consumer surplus could come