A total of 27,000 forged parts must be produced in the press department during the next 7 days. Hydraulic presses will be used to complete the job and the cycle time is 44 sec. Each press must be set up with a punch-and-die set before production starts. Setup time is 4.4hr. How many presses must be devoted to this production during the next 7 days, if there are 7.1hr of available time per machine per day