Fruit Computer Corporation makes custom fruit shaped computers. It is currently producing 60 computers per month. Data are as follows: If Fruit Computer Corporation expects to sell 50 units per month, how much is its margin of safety expressed in sales revenue? \begin{tabular}{|c|} \hline$16,800 \\ \hline$9870 \\ \hline$40,000 \\ \hline$23.200 \\ \hline \end{tabular}