Screener.in formulae clarification

I am a beginner for stock marker and could u please help me how to derive the formulae for the below 3 items using screener.in.If it is not present in screener.in the different site is also fine

1)Last three years average Return on Equity (ROE) and Return on
Capital Employed (ROCE) both are greater than 20%.
2) Last three years CAGR sales growth rate is more than 10%
3). Last three years CAGR profit growth rate is more than 12%

Average return on equity 3Years > 20 AND
Average return on capital employed 3Years > 20 AND
Sales growth 3Years > 10 AND
Profit growth 3Years > 12


Why do we have different returns in different sites?I have compared the wipro share between two sites and Which one we need to consider for long term investment?