4-13. TIE AND ROIC RATIOS The W.C. Pruett Corp. has $600,000 of interest-bearing debt outstanding, and it pays an annual interest rate of 7%. In addition, it has $600,000 of common equity on its balance sheet. It finances with only debt and common equity, so it has no preferred stock. Its annual sales are $2.7 million, its average tax rate is 25%, and its profit margin is 7%. What are its TIE ratio and its return on invested capital (ROIC)?