Kesterson Corporation has provided the following information: Cost per Unit Cost per Period Direct materials $ 6.60 Direct labor $ 3.90 Variable manufacturing overhead $ 1.55 Fixed manufacturing overhead $ 27,900 Sales commissions $ 1.90 Variable administrative expense $ 0.60 Fixed selling and administrative expense $ 7,200 The incremental manufacturing cost that the company will incur if it increases production from 9,000 to 9,001 units is closest to: