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 70%. Based on the DuPont equation, what was Vaughn's ROE? Select the correct answer Ca. 26.53% Ob. 27.12% Oc. 28.30% Od. 28.89% Ce. 27.71%