Contribution Margin United Merchants Company sells 37,000 units at $13 per unit. Variable costs are $10.79 per unit, and fixed costs are $24,500 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.) b. Unit contribution margin (Round to the nearest cent.) c. Income from operations per unit