Final answer:
To calculate the profit per haircut, we need to subtract the cost per haircut from the price charged per haircut. In this case, the cost per haircut is $1.50 and the price charged per haircut is $15.Brian and Amy make a $13.50 profit per haircut by charging customers $15 and spending $1.50 on supplies.
Step-by-step explanation:
The profit per haircut for Brian and Amy's hair-cutting business can be calculated by subtracting the cost of supplies from the charge to the customer. The cost of supplies is $1.50 per haircut, and they charge $15 per haircut. To find the profit, we subtract the cost from the charge: $15 - $1.50 = $13.50.
Therefore, the correct answer is c) $13.50 profit per haircut.