Answer:
a. Net income = Sales * profit margin
= $24 million * 10%/100
= $2.4 million
b. ROA = Profit / Total Assets
= $2.4 million / $21.1 million
= 0.11374
= 11.374%
c. ROE = Profit / (Total Assets - Debt)
= $2.4million / ($21.1million - $8.2million)
= $2.4million / $12.9 million
= 0.186
= 18.6%