$3)$ what is the standard deviation $($sample$)$ of the profit $?4)$ What is the servioe level?

$5)$ Is the service level acceptable to the supermarket? If yes$/$no$,$ explain why. Why not?

$6)$ To achieve a service level of $90\%\%,$ how many mobiles does the company stock every month?

$($Hints: use goal$-$sock$).$

$7)$ Ifthe supermarket aims for an average monthly profit of $100,000,$ what price should the supermarket charge per mobile to achieve this profit?

$*$ Wlar do you conclude about the status of the supermarket? What recommendations do you provide to improve the supermarkets performance?