Siegal Company has correctly computed its economic order quantity as 500 units; however, management feels it would rather order in quantities of 600 units. How should Siegal’s total annual purchase-order cost and total annual carrying cost for an order quantity of 600 units compare to the respective amounts for an order quantity of 500 units? 477 a Higher purchase-order cost and higher carrying cost b Lower purchase-order cost and lower carrying cost ce Higher purchase-order cost and lower carrying cost d Lower purchase-order cost and higher carrying cost.