QUESTION $33$

A dry cleaning firm uses an average of $20$ gallons of cleaning fluid a day. Usage tends to be normally distributed with a standard deviation of two gallons per day. Lead time is four days, and the desired service level is $92$ percent. What amount of safety stock is appropriate if a fixed order size of $600$ gallons is used?

$$

QUESTION $34$

A manager reorders lubricant when the amount on hand reaches $422$ poumps. Average daily usage is $45$ pounds, which is normally distributed with a standard deviation of three pounds per day. Lead time is nine days. What is the risk of a stockout?

$1\mathrm{.}89$

$0\mathrm{.}03$

$0\mathrm{.}29$

$0\mathrm{.}41$