Final answer:
The unit rate is $1.39 per square foot.
Step-by-step explanation:
The unit rate is the cost per square foot. To find the unit rate, we divide the total cost of the carpet by the total area. In this case, the total cost is $1500 and the total area is 1,080 square feet. Therefore, the unit rate is $1500/1080 = $1.39 per square foot.