A construction contractor needs to accelerate his construction schedule. He is in the process of placing wall forms for the pouring of a concrete wall. His ideal productivity standard is $5$ person$-$hours per $100$ square feet of contract area. He has a $5-$man crew placing the wall forms. The hourly rate of work is $$16$ per hour. Each worker is paid time$-$and$-$one$-$half for any hours in excess of $8$ hours a day. If a worker is required to work Saturday or Sunday, he is paid double time for this period.