Contribution margin Molly Company sells 39,000 units at $22 per unit. Variable costs are $17.38 per unit, and fixed costs are $104,500. 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.) \begin{tabular}{ll} & % \\ $ & per unit \\ $ & \end{tabular} c. Operating income