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 $6,170 Fixed operating expenses 3,790 9,960 The amount of operating income that would be reported on the variable costing income statement : a $599,850 (b. $458,040 c. $491,830 d. $590,040 C