The McPherson Company Is Facing a $6 Increase in the Variable

The McPherson Company is facing a $6 increase in the variable cost of producing one of its products for the upcoming year. Because of this situation, the sales manager has made a proposal to increase the selling price of the product while increasing the advertising budget at the same time. The price increase will lower sales volume, but the other changes may help the company maintain its profit margins. McPherson has provided the following information regarding the current year results and the proposal made by the sales manager:
$$\begin{array} { | l | r | r | } \hline & \text { Current Year } & \text { Proposal } \\\hline \text { Urit sales } & 27,000 & 18,000 \\\hline \text { Sales price per urit } & \$ 48 & \$ 58 \\\hline \text { Variable cost per urit } & \$ 30 & \$ 36 \\\hline \text { Fixed cost } & \$ 76,000 & \$ 96,000 \\\hline\end{array}$$
Relative to the current year, the sales manager's proposal will:

A) decrease operating income by $90,000.
B) increase contribution margin by $90,000.
C) decrease the unit breakeven point.
D) decrease operating income by $110,000.