please show your work so I can try and learn it before my final

3. Revenue and expense data for Bluestem Company are as follows: Year 2 Year 1 Administrative expenses $ 37,000 $ 20,000 Cost of goods sold 350,000 320,000 Income tax 40,000 32,000 Sales 800,000 700,000 Selling expenses 150,000 110,000 (a) Prepare a comparative income statement, with vertical analysis, stating each item for both years as a percent of sales. (b) Comment on significant changes disclosed by the comparative income statement. Pound