LUULE argiri United Merchants Company sells 19,000 units at $40 per unit. Variable costs are $23.20 per unit, and fixed costs are $156,400. 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.) per unit c. Income from operations