Kelly Company sells its only product for $9 per unit, variable production costs are $3 per unit, and

Kelly Company sells its only product for $9 per unit, variable production costs are $3 per unit, and selling and administrative costs are $1.50 per unit. Fixed costs for 10,000 units are $5,000. The contribution margin is: A) $6 per unit B) $4.50 per unit C) $5.50 per unit D) $4 per unit