Plano Corporation operated at 100% of capacity during its first month, with the following results: Sales (160 units) $160,000 Production costs (200 units): Direct materials $100.000 Direct labor 20.000 20.000 Variable factory overhead 4.000 144.000 Fixed factory overhead Operating expenses: Variable operating expenses $12.000 2.000 14.000 Fixed operating expenses The amount of manufacturing margin that would be reported on the variable costing income statement is $30.000 $48.000 $16.000 S56.000