9. A 24ft100ft12 inch wall is to be constructed using wall forms that are 24ft high 25ft long on each side. - Labor cost for erecting forms =4$/ft2 (new) and 2$/ft2 - Cost of Concrete (assume 5% waste) =100$/yd3 - Cost of reinforcement =50$/yd3 alculate the cost of building the wall. 10. An exterior e wall is 30ft8ft and has five door and windows. Each window is 3ft4ft and door is 3ft6.5ft. How many plywood sheets (48ft) are needed to the exterior wall