Exercise 2.1 Lila Battle has determined that the annual demand for number six screws is 100,000 screws. Lila, who is in charge of purchasing, estimates that the daily demand is 500 screws, and the order quantity is 10000. i) If delivery of an order takes 10 days, find the ROP and decide when to order. ii) If delivery of an order takes 21 days, find the ROP and decide when to order