A firm needs $100 to start its business. It expects $200 in sales and $185 in expenses. The document asks the reader to calculate the firm's earnings and return on equity in two scenarios: 1) with no financial leverage where the owners invest the full $100, and 2) with financial leverage where the firm borrows $40 at 10% interest. It also asks how the firm's earnings and returns are affected by increasing expenses and whether financial leverage is beneficial or disadvantageous in different situations.