Table $5.11$ The Following Information Has Been Collected on an Independent Demand

Table $5.11$
The following information has been collected on an independent demand item:
Demand $= 30$ units per week
(assume 52 weeks/ year)
Ordering and setup cost $= \$ 50$ perorder
Holding cost $= \$ 8$ per unit per year
Lead time $= 1$ week
Standard deviation in weekly demand $= 8$ units
Cycle- service level $= 90 \%$
You will need to refer to a normal table to answer the question(s) .
-Use the information from Table 5.11. Design a periodic review system (P system) , with P = 5 weeks. What target inventory T will provide the desired 90 percent cycle- service level?

A) between 188 and 192 units
B) between 53 and 57 units
C) between 172 and 176 units
D) between 202 and 206 units