- Each box of transistor costs ABC $40. - The cost of holding one box of transistor in inventory for one year is $4. - ABC places its order for the new shipment of transistors when the number of boxes in inventory drops to 10. - ABC sells the transistor at $70 per box. - ABC requires a 25 percent return on its average investment. Find the economic order quantity (EOQ) for ABC. The economic order quantity (EOQ) for ABC is 200 boxes of transistors.