William Beville's computer training school, in Richmond, stocks workbooks with the following characteristics: Demand D Ordering cost S Holding cost H 19,500 units/year $25/order $4/unit/year a) The EOQ for the workbooks is (round your response to the nearest whole number). b) What are the annual holding costs for the workbooks? $(round your response to the nearest whole number) c) What are the annual ordering costs? $(round your response to the nearest whole number).