Basic queries on Indian stocks

#1
guys, pardon me if this isn't the appropriate place for the below questions.my first post here :)

company no. 1 rel power
why is reliance power trading at a pe 124 with 1 year return of -11%? whereas the industry average is pe 21.11

also at http://economictimes.indiatimes.com/...anyid-4422.cms

the net income figure is broken down to 0 sales,where does the figure 223 cr Rs come from?

company no. 2: mindtree
here http://economictimes.indiatimes.com/...nyid-15673.cms

for march 08, the figures for manufacturing expenses almost swap with that for personal expenses.can someone tell me what is personal expense,and probable reason why this swap took place in '08?
 

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