Net sales revenue, net income, and common stockholders' equity for Crystal Vision Corporation, a manufacturer of contact lenses, follow for a four-year period.

Requirements
1. Compute trend percentages for each item for 2009 through 2012. Use 2009 as the base year.
2. Compute the rate of return on common stockholders' equity for 2010 through 2012.

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in thousands) 2012 2011 2010 2009 $7,293 $6,838 $6,305 $6,500 $ 682 $473 S 418 S 550 $3,558 $4,192 $2,688 $4,000 Net i Ending common stockholders' equity