Table $5.7$ Demand $= 5200$ Units/year
Standard Deviation of Weekly Demand $= 11$

Table $5.7$
Demand $= 5200$ units/year
Standard deviation of weekly demand $= 11$ units
Ordering costs $= \$ 45 /$ order
Holding costs $= \$ 2 /$ unit/year
Cycle-service level $= 90 \% ($ z for $90 \% = 1.28 )$
Lead time $= 3$ weeks
Number of weeks per year $= 52$ weeks
-Use the information in Table 5.7. The firm decided to change to the periodic review system to control the item's inventory. For the most recent review, an inventory clerk checked the inventory of this item and found 500 units. There were no scheduled receipts at the time. How many units should be ordered? (HINT: Use the EOQ model to derive P, the time between reviews.)

A) 0 units
B) greater than 0 but less than or equal to 300 units
C) greater than 300 but less than or equal to 600 units
D) above 600 units