The Cole Co.s selling price per unit is $76 and have a variable expense ratio of 56%. All fixed costs have been covered by previous sales. An increase in one unit of sales will: (mark all that apply)

increase NOI by $33.44.

increase NOI by $42.56.

decrease fixed costs by $33.44.

increase contribution margin by $42.56.

increase contribution margin $33.44.

decrease fixed costs by $42.46.