Emerson Equine Supplies earned $72,000 in 2015 and paid dividends of $44,640. The firm had equity of $150,000 at the beginning of the year. At the end of the year, the company had total assets of $195,000. During the year, the company sold no new equity. What is the sustainable growth rate? 15.32 percent 15.79 percent 17.78 percent 18.01 percent 18.24 percent