Consider a periodic review$$ system, where orders are placed every

$1818$

days. The firm strives to provide a

$94\mathrm{.}1894\mathrm{.}18\%$

cycle service level. Demand averages

$425425$

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

$104104$

units. Lead time is

$1111$

days$($round Z$-$values, standard deviations to two decimal$$ places$).$

Question content area bottom

Part $1$

a$.$ How many units of safety stock should be$$ held?

enter your response here

units$($round your response to the nearest$$ integer$).$

b$.$ What should the target inventory level$($order$-$up$-$to level$)$ be$?$

enter your response here

units$($round your response to the nearest$$ integer$).$

c$.$ Suppose that it is time to review the item. There are

$167167$

units in$$ inventory, and there is an outstanding backorder for

$415415$

units. An order for

$118118$

units is on the way. How many units should be ordered$$ now?

enter your response here

units$($round your response to the nearest$$ integer$).$