Due to erratic sales of its sole product$$a high$-$capacity battery for laptop computers$$PEM$,$ Incorporated, has been experiencing financial difficulty for some time. The company$$s contribution format income statement for the most recent month is given below:

Sales $(13,200$ units $\backslash$times $$30$ per unit$)$ $ $396,000$

Variable expenses $237,600$

Contribution margin $158,400$

Fixed expenses $176,400$

Net operating loss $ $(18,000)$