7 points 15. Pilon Company has sales of $800,000 during last year, operating costs of $570,000, and year-end assets (which are equal to its total invested capital) of $435,000. The debt-to-total-capital ratio is 17%, the interest rate on the debt is 7.5%, and the firm's tax rate is 40%. The new CFO wants to see how the return on common equity (ROE) may be affected if the firm has used a 50% debt-to-total-capital ratio. Assume that sales, operating costs, total assets, total invested capital, and the tax rate will not be affected, but the interest rate will rise to 8%. By how much will the ROE change in response to the change in the capital structure? Do not round your intermediate calculations