A business operated at 100% of capacity during its first month, with the following results: Sales (102 units) $5,100 Production costs (128 units): Direct materials $640 Direct labor 160 Variable factory overhead 288 Fixed factory overhead 256 1,344 Operating expenses: Variable operating expenses $621 Fixed operating expenses 457 1,078 What is the amount of the contribution margin that would be reported on the variable costing income statement? Select the correct answer. $4,972 $3,155 $3,612 $4,022