Contritution Mitigin United Merchants Company rells 40,000 units at $14 per unit, Vatiable costs are $11.06 per unit, and fixed costs are 544,700 . Determine (a) the contribution margin rath, (b) the unit contribution margin, and (c) operating income. a. Contribution margin rotio (Enter as a whole number.) b. Unit contribution margin (Roumd to the nearest cent.) per unit c. Operating income