Sales last year were $320,000, and net income after taxes was $23,000. What was the profit margin on sales? Select one: A. 6.49% B. 6.83% C. 7.19% D. 7.55% E. 7.92% Total assets at the end of last year were $315,000 and net income after taxes was $22,750. What was the return on total assets? Select one: A. 7.22% B. 7.58% C. 7.96% D. 8.36% E. 8.78%