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 required: (a) prepare a comparative income statement, with vertical analysis, stating each item for both years as a percent of sales. round your percentages to one decimal place. enter all amounts as positive numbers. refer to the accounts and amount descriptions for correct wording of text entries. (b) comment upon significant changes disclosed by the comparative income statement.