please help/explain the contribution margin for concord company

The CVP income statements shown below are available for Concord Company and Sheridan Company, Sheridan Co. Sales $495,000 Concord Co. $495,000 235,000 260,000 160,000 $100,000 Variable costs Contribution margin Fixed costs Net income 48,000 447.000 347,000 $100,000 (a1) Compute the degree of operating leverage for each company. (Round answers to 2 decimal places, es 1.15.) Degree of Operating Leverage 26 Concord 447 Sheridan (b) Assuming that sales revenue increases by 10%, prepare a variable costing income statement for each company. Concord Company Sheridan Company 544500 544500 Sales Revenue i 52800 258,500 Variable Costs 276.100 491700 Contribution Margin 160000 347.000 i Fixed Costs $ $ Net Income/(Loss)