The following costs result from the production and sale of 4,550 drum sets manufactured by Tight Drums Company for the year ended December 31, 2019. The drum sets sell for $305 each. The company has a 40% income tax rate.

Variable production costs
Plastic for casing	$	127,400
Wages of assembly workers		423,150
Drum stands		168,350
Variable selling costs
Sales commissions		118,300
Fixed manufacturing costs
Taxes on factory		9,500
Factory maintenance		19,000
Factory machinery depreciation		79,000
Fixed selling and administrative costs
Lease of equipment for sales staff		19,000
Accounting staff salaries		69,000
Administrative management salaries		149,000

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?