Breakeven EBIT level (levered vs. unlevered)

Zingo Corp. is debating between a leveraged and an unleveraged capital structure. The all equity capital structure would consist of 80,000 shares of stock. The debt and equity option would consist of 50,000 shares of stock plus $400,000 of debt with an interest rate of 8 percent. What is the break-even level of earnings before interest and taxes between these two options? Ignore taxes.