How much money I could earn from CPC and CPM ads on my website?

I am running a blog and the visitor count as of now is around 4000 / day . Majority of the visitors are from Search engines and rss subscribers. It’s a technology blog about how-to stuffs and interesting tips. Currently, I have not implemented any PPC or CPM ads. How much money I could earn [ Per day] If I implement PPC and CPM ads. I know It all depends on clicks and other stuffs. I would like to know the approximate amount. I am not interested in Affiliate marketing kind of stuffs for now.

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