Assume the following (1) variable expenses = $315,000, (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? The total fixed expenses = $63,000 The break-even point in sales dollars is $343,750 The total contribution margin = $252,000 The total sales = $378,000