In 2015 Camilles pet Store, Inc reported an ROA of 15.8%, and profit margin of 21.2 % . The firm had a total assets equal to $12.8 million at the end of 2015. What's common stockholders equity as of year end 2015 for Camilla Pet Stores, Inc? A. $6.7 million B. $9.3 million C. $8.1 million D. $7.5 million.