The following is Allison Corporation's contribution format income statement for last month: Sales Less Variable expenses Contribution Margin Less Fixed expenses Net Income $800,000 $300,000 $500,000 $400,000 $100,00 The company has no beginning or ending inventories. The company produced and sold 10,000 units last month. What is the company's break-even sales in dollars? $0 $100,000 $700,000 $640,000 $400,000