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 mont is given below: Sales (19,500 units x $30 per unit) Varieble expenses Contribution margin Fixed expenses Net operating loss $ 585,000 409,500 175,500 180,000 $ (4,500)