Consider a periodic review

$$

$$system$,$ where orders are placed every

$2$

$0$

$$days$.$ The firm strives to provide a

$9$

$5$

$.$

$0$

$5$

$$

$\%$

$$cycle service level. Demand averages

$4$

$1$

$0$

$$units per

$$

$$day$,$ and the standard deviation of demand per day is

$1$

$0$

$6$

$$units$.$ Lead time is

$9$

$$days

$$

$($

round Z

$-$

values, standard deviations to two decimal

$$

$$places

$)$

$.$