20-Spice Inc.'s unit selling price is $54, unit variable costs are $33, fixed costs are $120,000, and current sales are 9,300 units. How much will operating income change if sales increase by 5,500 units?

30 The contribution margin ratio is the

a.same as the variable cost ratio

b.portion of equity contributed by stockholders

c.same as the profit-volume ratio

d.same as profit