plz answer this question quick (will like up c:)

A business operated at 100% of capacity during its first month, with the following results: Sales (120 units) $600,000 Production costs (150 units): Direct materials $75,000 Direct labor 18,750 Variable factory overhead 33,750 Fixed factory overhead 30,000 157,500 Operating expenses: Variable operating expenses $5,700 Fixed operating expenses 4,250 9,950 The amount of contribution margin that would be reported on the variable costing income statement is Oa. $599,850 b. $492,300 c. $590,050 O d. $488,050