Comparative Statements for Kool Corporation Are Shown Below Calculate Trend Percentages for All Income Statement Amounts Shown and

Comparative statements for Kool Corporation are shown below:
$\begin{array}{c} \text { Kool Corporation}\\ \text { Comparative Income Statement}\\ \text { For the years ended December 31}\\\begin{array}{|l|c|c|c|}\hline & 2011 & 2010 & 2009 \\\hline \text { Sales } & \$ 14,800 & \$ 13,229 & \$ 13,994 \\\hline \text { Cost of goods sold } & 8,225 & 8,661 & 8,375 \\\hline \text { Gross profit } & 6,575 & 4,568 & 5,619 \\\hline \text { Operating expenses } & 3,664 & 3,576 & 3,487 \\\hline \text { Operating income } & \$ 2,911 & \$ 992 & \$2,132 \\\hline\end{array}\end{array}$
Calculate trend percentages for all income statement amounts shown and comment on the results.Use 2009 as the base year.