Division a Makes a Part with the Following Characteristics Division B, Another Division of the Same Company, Would Like

Division A makes a part with the following characteristics:
$\begin{array}{|l|r|}\hline \text { Production Capacity in Units } & 15,000 \text { units } \\\hline \text { Selling Price to Outside Customers } & \$ 25 \\\hline \text { Variable Cost per Unit } & \$ 18 \\\hline \text { Total Fixed Costs } & \$ 60,000 \\\hline\end{array}$
Division B, another division of the same company, would like to purchase 5,000 units of the part each period from Division A. Division B is now purchasing these parts from an outside supplier at a price of \$24 each.

- Suppose that Division A has ample idle capacity to handle all of Division B's needs without any increase in fixed costs and without cutting into sales to outside customers.If Division B continues to purchase parts from an outside supplier rather than from Division A,what will be the effect on the operating income of the company as a whole?

A) Lower by $30,000 each period.
B) Lower by $10,000 each period.
C) Higher by $15,000 each period.
D) Lower by $35,000 each period.