The Anand Medical Store stocks a popular brand of

sunscreen. The average demand for the sunscreen is $6$ bottles per day,

with a standard deviation of $1\mathrm{.}2$ bottles. A vendor for the sunscreen

producer checks the drugstore every $60$ days $.$ During one visit, the drug

store had $8$ bottles in stock. The lead time to receive an order is $5$ days.

Determine the order size for this order period that will enable the

drugstore to maintain a $95\%$ service level. Consider value of z$=1\mathrm{.}65$ for

$95$ percent service level.