Jae's Shoes is considering a change of their current inventory control system for sneakers. The information regarding the neckties is: Demand = 1000 pairs/week; Lead time = 3 weeks: Order cost="$20/order: Holding cost= $10.00/pair/yr, Cycle service level = 95%; Standard deviation of weekly demand = 48; and Number of weeks per year = 52. To calculate the relative frequency use the following values: a) Units Sold and Number of Days b) Number of Days and Standard Deviation of Weekly Demand c) Units Sold and Demand d) Lead Time and Holding Cost