The Drug Store carries Deodorant R, which has an expected demand of 15,000 jars per year (or 60 jars per day with 250 days per year). Lead time from...

Hi, I was given the solution to a problem about a perpetual inventory system. However, I still don't understand exactly how my professor came up with the answer and what exactly the answer to the question is still. I've attached the file that contains question 5 along with the solution to the problem which is below question 5.I don't understand how to figure out what the following answers are to:BSD(LT)kROP sigmasigma squaresigma/dayCould you please help me?