An automated stamping operation is fed by coil stock. each coil costs $500. scrap metal after each coil has been used is sold for $2000/ton. there is approximately 70 lb. scrap per role. a total of 2,500 parts are produced per coil. the press operates at 15 strokes per min. setup time before production is 2.0 hr., which includes loading the first coil. changeover time between coils is 20 min. the cost of operating the press is $75 per hr. the compound die cost is $50,000 and is expected to produce a total of 200,000 stampings. parts are run in batches of 20,000 stampings. each roll produces 4,000 stampings. find the following:  time required to complete a batch.  average production rate.  cost per piece.