comparative income statements for 2020 and 2019 follow sales 20209434000 sales 2019 7862000 cost of sales 2020 7075400 cost os sales 2019 5660640 operating expenses 2020 1367690 operating expenses 2019 1365060 gross profit 2020 2358600 gross profit 2019 2201360 interest expense 2020 157500 interest expense 2019 126000 income taxes 2020 400000 income taxes 2019 317200 net income 2020 433410 net income 2019 393100 required :prepare a vertical common size analysis of this statement for each year using sales as the base and comment briefly of the changes between the two years based on the vertical common size