Question $1$

Given the information below, how much safety stock should be held?

Average Customer Demand: $100$ units

Standard Deviation of Customer Demand: $10$ units

Supplier Lead Time: $9$ days

Desired Service Level $($order fill rate$)$: $98\mathrm{.}5\%$

Z score for $98\mathrm{.}5\%$:$2\mathrm{.}17$

$63$

$195$

$50$

$100$