Last year Vaughn Corp. had sales of $315,000 and a net income of $17,832, and its year-end assets were $210,000. The firm's total-debt-to-total-assets ratio was 42.5%. Based on the Du Pont equation, what was Vaughn's ROE? Answer 14.77% 15.51% 16.28% 17.10% 17.95%