Daily demand for packages of five videotapes at a warehouse store is found to be normally distributed with mean 50 and standard deviation 5.

Daily demand for packages of five videotapes at a warehouse store is found to be normally distributed with mean 50 and standard deviation 5. When the store orders more tapes, the ordering cost is $42 and the orders take 4 days to arrive. Each pack of tapes costs $7.20 and there is a 24% annual holding cost for inventory. Assume the store is open 360 days a year.