The following is Allison Corporation's contribution format income statement for last month: Sales Less: variable expenses Contribution margin Less: fixed expenses Operating income $800,000 400,000 400,000 300,000 $100,000 The company has no beginning or ending inventories. The company produced and sold 20,000 units last month. What is the company's break-even sales in dollars? $700,000 $600,000 $400,000 $0 statement for last