Referring to the illustration, what is the total number of square feet of forms required to form both sides of the planter walls ONLY if the forms extend 6″ above the top of the wall? Assume the wall is centered on the footing.

Referring to the illustration, what is the total number of square feet of forms required to form both sides of the planter walls ONLY if the forms extend 6″ above the top of the wall? Assume the wall is centered on the footing.