Answer:
$22
Step-by-step explanation:
consumer surplus is the difference between the price that consumers are willing and able to pay for a good versus the selling of the good:
- Logan = $30 - $20 = $10
- Shelby = $27 - $20 = $7
- Alex = $25 - $20 = $5
- total = $22
Since Luke, Nigel and Emily probably didn't buy the t-shirts, they are not included in this calculation.
The only way consumer surplus can be negative is that consumers are forced to purchase an essential good, but that is not the case here.