The following information is for a product manufactured and sold by Crane Company Sales price per unit: $50 Variable cost per unit: S30 Total annual fixed costs: $300.000 Required 1) Calculate the contribution margin per unit. 2) How many units must Crane sell to break-even? 3) How many units must Crane sell to achieve a profit of $90.000? 4) Calculate the change in profit if Crane Company increases the selling price by 10% and the fixed costs by 10%