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 72.5%. Based on the DuPont equation, what was Vaughn's ROE?

Select the correct answer.

a. 30.88%

b. 31.98%

c. 30.33%

d. 29.78%

e. 31.43%