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Contribution Margin Molly Company sells 17,000 units at $40 per unit. Variable costs are $22.40 per unit, and fixed costs are $107,700. Determine (a) the contribution margin ratio, (b) the unit contribution margin, and (c) operating income. a. Contribution margin ratio (Enter as a whole number.) % b. Unit contribution margin ( Round to the nearest cent.) per unit c. Operating income