In: Finance
Richmond Clinic has obtained the following estimates for its costs of debt and equity at various capital structures:
| After-Tax | ||
| Percent | Cost of | Cost of |
| Debt | Debt | Equity |
| 0% | 16% | |
| 20% | 6.6% | 17% |
| 40% | 7.8% | 19% |
| 60% | 10.2% | 22% |
| 80% | 14.0% | 27% |
What is the firm's optimal (lowest cost) capital structure? Please include an excel formula (if applicable).
A) What percent equity?
B) What percent debt?

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