Waterway Industries sells its product for 7600 per unit. Variable costs per unit are: manufacuring, 3600, and selling and administrative, 125. Fixed costs are: 18000 manufacturing overhead, and 24000 selling and administrative. There was no beginning inventory at 1/1/15. Production was 20 units per year in 2015-2017. Sales were 20 units in 2015, 16 units in 2016, and 24 units in 2017. Income under variable costin for 2017 is: