Revenue and Expense Data for Bluestem Company Are as Follows

Revenue and expense data for Bluestem Company are as follows:
$\begin{array}{lrr}&\text { Year 2}&\text { Year 1}\\\text { Administrative expenses } & \$ \overline{37,000} & \overline{\$ 20,000} \\\text { Cost of goods sold } & 350,000 & 320,000 \\\text { Income tax } & 40,000 & 32,000 \\\text { Sales } & 800,000 & 700,000 \\\text { Selling expenses } & 150,000 & 110,000\end{array}$ a Prepare a comparative income statement,with vertical analysis,stating each item for both years as a percent of sales.
b Comment upon significant changes disclosed by the comparative income statement.
Round percentages to one decimal place.