$3.(3\mathrm{.}5$ points$)$ Finally, what is the cycle service level $($CSL$)$ if the reorder point is $300$ boxes? What is the reorder point required to ensure a $96\%$ cycle service level?

Cycle service level $($CSL$)($when R$=300$ boxes$)$:

REQUIRED reorder point R for the $96\%$ CSL: