Compute its contribution margin per unit and its contribution margin ratio. (Round Contribution margin ratio to nearest whole percentage.) For each dollar of sales, how much is left to cover fixed costs and contribute to operating income? (Round your answer to 2 decimal places.) For each dollar of sales, how much is left to cover fixed costs and contribute to operating income? The following costs result from the production and sale of 4,750 drum sets manufactured by Tight Drums Company for the year ended December 31,2019 . The drum sets sell for $325 each. The company has a 40% income tax rate. Required: 1. Prepare a contribution margin income statement for the year. 2. Compute its contribution margin per unit and its contribution margin ratio. 3. For each dollar of sales, how much is left to cover fixed costs and contribute to operating income