Bendel Incorporated has an operating leverage of 4.0. If the company's sales increase by 12%, its net operating income should increase by about: Multiple Choice 48.0% 3.0% 12.0% 34.4% Selling price Units in beginning inventory Units produced Units sold Units in ending inventory $93 0 3,600 3,020 580 Variable costs per unit: Direct materials Direct labor Variable manufacturing overhead Variable selling and administrative expense Fixed osts: Fixed manufacturing overhead Fixed selling and administrative expense $ 19 $ 33 $ 5 $ 5 $61,500 $ 3,500 The total contribution margin for the month under variable costing is: Fixed costs: Fixed manufacturing overhead Fixed selling and administrative expense The total contribution margin for the month under variable costing Multiple Choice O $93,620 $28,620 $32,120 $108,720 Selling price Units in beginning inventory Units produced Units sold Units in ending inventory $ 135 0 2,700 2,210 490 Variable costs per unit: Direct materials Direct labor. Variable manufacturing overhead Variable selling and administrative expense Fixed costs: Fixed manufacturing overhead Fixed selling and administrative expense $ 37 $ 27 $ 7 $ 8 $59,400 $6,630 The total gross margin for the month under the absorption costing approach is: Multiple Choice $75,140 $86,190 O O $92,820 $161,330