The following information is available about the operation and purchase of the paper:
Ordering cost : $60. / order
Annual holding cost per unit : 20.% of cost per unit
Desired cycle service level : 95%
Lead time : 4 days
Standard deviation of daily demand : 3 units per day
Current on-hand inventory is 900 units, with no open orders or backorders.
v. An inventory withdrawal of 100 units was just made. - Is it time to reorder?
vi. If the store currently uses a lot size of 1300 units, determine the annual holding cost and the annual ordering cost of this policy?
vii. What would be the annual cost saved, if any, by shifting from the 1300-unit lot size to the EOQ?