anable expense per unit is $9. , variable expenses are 60% of sales. 10. A company has provided the following data: Sales... Sales price . Variable cot. Fixed cost....$ 3,000 units $70 per unit $50 per unit $25.000 If the dollar contribution margin per unit is increased by 10%, total fixed cost is decrea 20%, and all other factors remain the same, net operating income will: A. increase by $61,000. B. increase by $20,000. C. increase by $3,500. D. increase by $11,000. 11. At a break-even point of 400 units sold, variable expenses were $4,000 and fixe were $2,000. What will the 401st unit sold contribute to profit? A. $0 B. $5 C. $10 D. $15