A business operated at 100% of capacity during its first month and incurred the following costs: Production costs (5,000 units): Direct materials $70,000 Direct labor 20,000 Variable factory overhead 10,000 Fixed factory overhead 2,000 $102,000 Operating expenses: Variable operating expenses $17,000 Fixed operating expenses 1,000 18,000 If 1,000 units remain unsold at the end of the month and sales total $150,000 for the month, the amount of contribution margin that would be reported on the variable costing income statement is a $52,000 b. $53,000 c. $54,000 d. $51,400