Weekly production requirements of a product are 1000 items. The cycle time of producing one product on a machine is 10 minutes. The factory works on two shift basis in which total available time is 16 hours. Out of the available lime about 25% is expected to be wasted on break downs, material unavailability and quality related problems. The factory works for 5 days in a week. How many machines are required to fulfill the production requirements?
(a) 2 (b) 3 (c) 4 (d) 6