Please answer all parts to chart

he following costs result from the production and sale of 4,850 drum sets manufactured by Tight Drums Company for the year ended December 31, 2017 The drum sets sell for $335 each. The company has a 30% income tax rate Variable production costs Plastic for casing Wages of assembly workers Drum stands 164,900 480,150 208,550 Variable selling costs Sales cormissions 155,200 Fixed manufacturing costs Taxes on factory Factory maintenance Pactory machinery depreciation 6,s00 13,000 73,000 Fixed selling and administrative costs Lease of equipment for sales staff Accounting staff salaries Administrative management salaries 13,000 63 000 143,000 Required 1. Prepare a contribution margin income statement for the company 2. Compute its contribution margin per unit and its contribution margin ratio