Edmonco Company Produced and Sold 45,000 Units of a Single

Edmonco Company produced and sold 45,000 units of a single product last year, with the following results: $\begin{array}{lr}\text { Sales revenue } & \$ 1,350,000 \\\text { Manufacturing costs: } & \\\quad \text { Variable } & 585,000 \\\text { Fixed } & 270,000 \\\text { Selling costs: } & \\\quad \text { Variable } & 40,500 \\\quad \text { Fixed } & 54,000 \\\text { Administrative costs: } & \\\quad \text { Variable } & 184,500 \\\text { Fixed } & 108,000\end{array}$ If Edmonco's sales revenues increase 15%, what will be the percentage increase in income before income taxes?

A) 15%.
B) 45%.
C) 60%.
D) 75%.
E) None of the other answers is correct.