Total Per Unit $1,000,000 $50.00 $200,000 $10.00 $50,000 $2.50 Sales (20,000 units)............... Direct materials .......... Direct labor (variable)... Manufacturing overhead: Variable....... Fixed.............. Selling & administrative: Variable.... Fixed..... $70,000 $80,000 $3.50 $4.00 $100,000 $30,000 $5.00 $1.50 Required: Compute the following items: a. Unit contribution margin. b. Contribution margin ratio. c. Break-even in dollar sales. d. Margin of safety percentage