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

	2019			2020			2021
Revenue
Southwest	$	14,600		$	21,700		$	25,700
Midwest		6,400			6,700			6,900
Southeast		12,100			12,700			13,000
Total	$	33,100		$	41,100		$	45,600
Net Operating Income
Southwest	$	800		$	900		$	1,050
Midwest		950			1,300			1,250
Southeast		700			900			1,300
Total	$	2,450		$	3,100		$	3,600
Average Total Assets
Southwest	$	13,700		$	13,900		$	16,500
Midwest		4,400			3,900			3,900
Southeast		5,000			5,300			5,300
Total	$	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.)