William Beville's computer training school in Richmond, stocks Workbooks with the following characteristics: Demand D Ordering costs Holding cost H 19,500 units/year $27/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)