What is the volume of the composite figure?

I got 2,592 ft^3

explanation (little figure on top): base is 9, height is 6, and length is 12.
9 x 6 x 12 = 648 cubic feet.

explanation (larger figure): base is 27, height is 6, and length is 12.
12 x 6 x 27 = 1,944 cubic feet.

now add the two together to get the whole volume.. 1,944 + 648 = 2,592 ft^3

hope this helps!