Assume the following (1) variable expenses = $280,000, (2) unit sales = 10,000, (3) the contribution margin ratio = 20%, and (4) net operating income = $10,000. Given these four assumptions, which of the following is true? Multiple Choice The total fixed expenses = $56,000 The break-even point in sales dollars is $300,000 The total contribution margin = $224,000 The total sales = $336,000