Assume the following (1) variable expenses = $300,000, (2) unit sales = 10,000, (3) the contribution margin ratio = 25%, and (4) net operating income = $10,000. Given these four assumptions, which of the following is true? Multiple Choice The total fixed expenses = $90,000 The variable expense ratio is 300% The total contribution margin = $225,000 The total sales = $375,000