Attawtik Compagny sells product Ator S80 each. Number of units 50,000. The income statement for previous period was as following: Sales Variable costs Contribution Margin Fixed costs Pretax profit $4,000,000 (2.200,000) 1,800,000 (1,600,000) $ 200,000 1. Compute the contribution margin per unit and the number of units that must be sold to break even. b. Compute the contribution margin ratio and the breakeven point in total revenue