"A firm has the following cost structure for the number of units sold
For 6,700 units
Direct labor : $29,000
Direct materials : $48,000
Administrative costs : $11,000
Marketing cost : $4,200
Facility operations : $27,000
For 13,400 units
Direct labor : $58,000
Direct materials : $96,000
Administrative costs : $11,000
Marketing cost : $4,200
Facility operations : $27,000
Assume the firm sells each unit for $51. What is the firm's break-even volume (rounded to the nearest unit)?"