A business operated at 100% of capacity during its first month, with the following results: Sales (112 units) $560,000 Production costs (140 units): Direct materials $70,000 Direct labor 17,500 Variable factory overhead 31,500 Fixed factory overhead 28,000 147,000 Operating expenses: Variable operating expenses Fixed operating expenses $6,020 3,860 9,880 The amount of operating income that would be reported on the variable costing income statement is a. $458,780 Ob. $559,860 Oc. $426,920 Od. $550,120