Green Company sells its product for $10200 per unit. Variable costs per unit are: manufacturing, $5200; and selling and administrative, $135. Fixed costs are: $28800 manufacturing overhead, and $38800 selling and administrative. There was no beginning inventory at 1/1/18. Production was 24 units per year in 2018-2020. Sales were 24 units in 2018, 20 units in 2019, and 28 units in 2020. Income under variable costing for 2020 is $58180. $63380. $63820 $68620. O