4.4 Daily demand of car batteries in Best Auto Mart (BAM) is normally distributed with a mean of 15 and a standard deviation of 10. BAM opens 365 days a year. Its replenishment lead time follows a normal distribution with a mean of 5 days and a standard deviation of 2days. The inventory holding cost at BAM is $17 per battery per year. The xed ordering cost is $315 per order. BAM targets a cycle service level of 95%. BAM uses a periodic review policy. How often should BAM review its inventory? What OUL should be used?