A structure with 8′ high walls is to be constructred of 8″ x 8″ x 16″ CMU. The structure is 20′ wide by 40′ long. There are no windows or doors. Assuming no waste, how many CMU will be needed?

A structure with 8′ high walls is to be constructred of 8″ x 8″ x 16″ CMU. The structure is 20′ wide by 40′ long. There are no windows or doors. Assuming no waste, how many CMU will be needed?