You are employed as a concrete finisher whose customer needs to purchase concrete to enclose an area that is rectangular and has a length of 56 feet and is 32 feet wide. The concrete will be 3 inches thick. The cost of the concrete and its installation is $15.68 per cubic foot. What is the total cost of this project?
a. $9,930.24
b. $10,144.64
c. $10,362.56
d. $10,584.32