From the Information in the Table Below,calculate the Unit Sales

Multiple Choice

From the information in the table below,calculate the unit sales necessary to achieve the desired profit.
$\begin{array}{|l|r|}\hline \text { Selling price per unit} & \$ 20.00 \\\hline \text { Variable cost per unit }& \$ 12.00 \\\hline \text { Fixed costs }&\$ 50000 \\\hline \text { After-tax desired profit }& \$ 70000 \\\hline \text { Tax rate} & 30 \% \\\hline\end{array}$

A) 15 000 units.
B) 8 750 units.
C) 12 500 units.
D) 18 750 units.