Lamar Has the Following Data If Lamar Produces and Sells 30,000 Units,what Is the Margin

Lamar has the following data:
$\begin{array}{c}\begin{array}{|l|}\hline \text {Selling Price}\\\text {Variable manufacturing cost}\\\hline\\ \text {Fixed manutacturing cost.}\\\hline \text {Variable selling \& administrative}\\\text {costs}\\\hline \\\text {Fixed selling \& administrative costs}\\\hline\end{array}\begin{array}{l|}\hline\$ 40 \\\$ 22 \\\hline \\\$ 150,000 \\\hline\\ \$ 6 \\\hline\\ \$ 120,000 \\\hline\end{array}\begin{array}{l|}\hline\\\\\hline \text {per}\\\text {month}\\\hline\\\\\hline \text {per}\\\text {month}\\\hline \end{array}\end{array}$
If Lamar produces and sells 30,000 units,what is the margin of safety in units?

A) 5,000 units.
B) 7,500 units.
C) 22,500 units.
D) 30,000 units.