The following costs result from the production and sale of 4,350 drum sets manufactured by Tight Drums Company for the year ended December 31. The drum sets sell for $285 each. Variable costs Plastic for casing Wages of assembly workers. Drum stands Sales commissions Fixed costs Taxes on factory Factory maintenance $ 104,400 387,150 143,550 95,700 13,500 27,000 87,000 27,000 77,000 157,000 Factory machinery depreciation Lease of equipment for sales staff Accounting staff salaries Administrative salaries 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?