What is PE Ratio? How is it used? What ERP have you worked on and a little about that? Cost and profit variances? Liquidity ratios?

What is PE Ratio? How is it used? What ERP have you worked on and a li

1.	What is PE Ratio? How is it used? What ERP have you worked on and a little about that? Cost and profit variances? Liquidity ratios?
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