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Contribution Margin Sally Company sells 38,000 units at $43 per unit, Variable costs are $35.26 per unit, and floxed costs are $158,800. Determine (a) the contribution margin ratio, (b) the unit contribution margin, and (c) operating income. a. Contribution margitt ratio (Enter as a whole number.) % b. Unit contribution margin (Round to the nearest cent.) per unit c. Operating income