SBD Phone Company sells its waterproof phone case for $90 per unit. Fixed costs total $162.000, and variable costs are $36 per unit (1) Determine the contribution margin ratio. per unit Contribution margin Contribution margin ratio Choose Numerator:Choose Denominator:Contribution margin ratio margin ratio (2) Determine the break-even point in dollars Break-even point in dollars Choose Numerator: Choose Denominator: Break-even point in dollars