William Beville's computer training school, in Richmond, stocks workbooks with the following characteristics: Demand D Ordering cost S Holding cost H 19,900 units/year $23/order $4/unit/year a) The EOQ for the workbooks is 478 (round your response to the nearest whole number). b) What are the annual holding costs for the workbooks? $ 956 (round your response to the nearest whole number). c) What are the annual ordering costs? $ (round your response to the nearest whole number).