Liz Raiborn Inc. has the following financial results for the years 2019 through 2021 for its three regional divisions:

201920202021RevenueSouthwest$14,600$21,700$25,700Midwest6,4006,7006,900Southeast12,10012,70013,000Total$33,100$41,100$45,600Net Operating IncomeSouthwest$800$900$1,050Midwest9501,3001,250Southeast7009001,300Total$2,450$3,100$3,600Average Total AssetsSouthwest$13,700$13,900$16,500Midwest4,4003,9003,900Southeast5,0005,3005,300Total$23,100$23,100$25,700

Required:

Calculate return on sales (ROS), asset turnover (AT), and return on investment (ROI) for each division and also for the firm as a whole for each of the three years 2019, 2020, and 2021. (Note: Due to rounding your percentages, the totals for the firm might not be the actual total of the individual divisions.)(Round "Asset turnover (AT)" answers to 3 decimal places and other answers to 1 decimal place.)