Paradigm Company had sales of $500,000, operating income of $50,000 and net income of $20,000 in 2019. Total assets amounted to $380.000 at the beginning of 2019 and 420,000 at the end of the year. Total stockholders equity amounted to $45,000 at the beginning of 2019 and $55,000 at the end of 2019. A. Using the DuPont formula, calculate the return on total assets for Paradigm in 2019. B. Calculate return of stockholders equity for 2019.