YSU store sells university logo hats. Daily demand is 23 hats with a standard deviation of 4 hats per day. Each hat costs $7.85. Ordering costs are $11. The carrying costs are $2 per year. The store is open 250 days per year. Lead time is 5 days with a standard deviation of 1.6 days. Desired service level is 98%. Use the z-table.pdf to find the corresponding z-value. Calculate the ROP with safety stock