23. Suppose a clothing store sells jeans throughout the year. The average weekly sales of a particular brand are 192 pairs, with a standard deviation of 30 pairs. The supplier charges $40 per pair, and the ordering cost is $20. The annual holding cost is 25% of the jeans' value. The lead time for replenishing the jeans stock is constant at four weeks. Management desires a 98% service level. Please determine a) the optimal order quantity (EOQ), b) safety stock (SS), c) reorder point (ROP), and d) total cost using this information.