A firm has the following cost structure for the number of units sold For 5,600 units Direct labor : $21,000 Direct materials : $26,000 Administrative costs : $12,000 Marketing cost : $4,400 Facility operations : $29,000 For 11,200 units Direct labor : $42,000 Direct materials : $52,000 Administrative costs : $12,000 Marketing cost : $4,400 Facility operations : $29,000 Assume the firm sells each unit for $49. What is the firm's break-even volume (rounded to the nearest unit)