Seth built a wooden step stool out of two rectangular prisms and two cubes. before fastening the components together, he stained each component to give it its final color.

to completely stain the bottom rectangular prism, seth had to cover
square inches of wood. for one of the cubes to be completely stained, he had to cover
square inches of wood. to completely stain the top rectangular prism, he had to cover
square inches of wood.

once the stool was fastened together, he applied a coat of sealant to all exposed surfaces of the stool, including the bottom, to cover a total of
square inches.