Contribution Margin Sally Company sells 36,000 units at $13 per unit. Variable costs are $9.49 per unit, and fixed costs are $43,000. Determine (a) the contribution margin ratio, (b) the unit contribution margin, and (c) income from operations. a. Contribution margin ratio (Enter as a whole number.) 96 b. Unit contribution margin (Round to the nearest cent.) per unit C. Income from operations