Brief Exercise 18-8 Partially correct answer. Your answer is partially correct. Try again. Rice Company has a unit selling price of $650, variable costs per unit of $325, and fixed costs of $280,475. Compute the break-even point in units using (a) the mathematical equation and (b) contribution margin per unit. (a) Mathematical Equation (b) Contribution margin per unit Break-even point Entry field with correct answer units Entry field with incorrect answer units