4 Assume the following (1) sales = $200,000, (2) unit sales = 10,000, (3) the contribution margin ratio = 40%, and (4) net operating income = $10,000. Given these four assumptions, which of the following is true? Multiple Choice O The total fixed expenses = $120,000 O The variable expense per unit = $8.00 The total contribution margin = $80,000 The break-even point is 7,500 units