Find out company unit contribution margin

Question

Problem: A company that makes organic fertilizer has supplied the following data:

Bags produced and sold                          240,000
Sales revenue                                       1,896,000
Variable manufacturing expense                804,000
Fixed manufacturing expense                     520,000
Variable selling and administrative expense  180,000
Fixed selling and administrative expense       270,000
Net operating income                                   122,000

The company's unit contribution margin is closest to:

• 3.80
• 4.55
• 4.10
• 7.15