Palin's Muffler Shop has one standard muffler that fits a large variety of cars. The shop wishes to establish a periodic review system to manage inventory of this standard muffler. Use the information in the following table to answer the below questions.

$\backslash$table$[[$Annual demand,$3,000$ mufflers$],[$Standard deviation of daily demand,$6$ mufflers per working day$],[$Item cost$,$$$30$ per muffler$],[$Annual holding cost,$25\%$ of item value$],[$Review period,$15$ working days$],[$Ordering cost$,$$$50$ per order$],[$Service probability,$90\%$