· A company manufactures and sells a single product. The following information is available for the year: Sales revenue $500,000, Variable costs $200,000, Fixed costs $100,000, Depreciation expense $20,000, Interest expense $10,000, Income tax rate 30%. Prepare a contribution margin income statement and calculate the net profit after tax. Discuss the usefulness of contribution margin analysis in assessing the company's profitability and cost structure.