The following costs result from the production and sale of 4,950 drum sets manufactured by Tight Drums Company for the year end December 31. The drum sets sell for $345 each. Variable costs Plastic for casing $ 178,200 Wages of assembly workers 499,950 Drum stands 222,750 Sales commissions 168,300. Fixed costs Taxes on factory 5,500 Factory maintenance 11,000 Factory machinery depreciation 71,000 Lease of equipment for sales staff 11,000 Accounting staff salaries 61,000 Administrative salaries 141,000. Required: 1. Prepare a contribution margin income statement for the year. 2. Compute contribution margin per unit and contribution margin ratio. 3. For each dollar of sales, how much is left to cover fixed costs and contribute to income? Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Compute contribution margin per unit and contribution margin ratio. (Round Contribution margin ratio to nearest whole percentage.)