The data for various companies in the same industry are as follows:

$\backslash$table$[[,$COMPANY$],[,$A$,$B$,$C$,$D$,$E$,$F$],[$Sales $($in Thousand Rs$.),2,500,5,000,2,000,1,250,3,000,4,250],[$Total Assets $($in Thousand Rs$.),2,000,2,500,1,500,625,1,000,2,000],[$Net Income $($in Thousand Rs$.),175,500,200,125,375,250]]$

You are required to determine:

i$.$ Total asset turnover

ii$.$ Net profit margin

$(20)$

iii. Earning power for each Company

iv$.$ Compare and Comment on the efficiency and profitability of each company.