How to solve

$(8)$ Question: CY$-$Sport Store also sells tennis rackets. Demand for rackets is $40$

units per week. The standard deviation of weekly demand is $5$ units. The...

CY$-$Sport Store also sells tenr's rackets. Demand for rackets is $40$ units per week. The standard deviation of weekly demand is $5$ units.

The average lead time is $2$ weeks with a standard deviation of $0\mathrm{.}5$ weeks. The estimated cost to process orders for rackets is $$25$ and

the holding cost is $$8$ per year. The store operates $52$ weeks a year.

If the company wants to maintain a $90\%$ service level, what is the required safety stock? What is the ROP?

$35\mathrm{.}002$ and $115\mathrm{.}002$

$41\mathrm{.}578$ and $121\mathrm{.}578$

$27\mathrm{.}153$ and $107\mathrm{.}153$

$27\mathrm{.}500$ and $87\mathrm{.}152$