Homework 4 1) Contribution Margin Lanning Company sells 160,000 units at $45 per unit. Variable costs are $27 per unit. and xed costs are $975,000. Determine (a) the contribution margin ratio, (b) the unit contribution margin, and (c) income from operations. a. _Contribution margin 42 % ratio b. Unit contribution $18.9 per margin unit c. Income from operations $334,300