The Landes Excavating Company experienced the following costs in 2007: Direct materials $1.75/unit Direct labor $2.00/unit Variable manufacturing overhead $2.50/unit Variable selling $.75/unit Fixed manufacturing overhead $50,000 Fixed selling $15,000 Fixed administrative $5,000 During the year the company manufactured 100,000 units and sold 80,000 units. If the average selling price per unit was $22.65 what is the company's contribution margin per unit?