In order to stay on top of the costs it seems that you have to check on them daily.

If you are that dilligent, then more power to you for increasing revenue.

Google is smart to keep much a secret....everyone is trying to one-up everyone else.

Knowing how much a click COSTS the advertiser is only half the battle...I doubt it's a set percentage of all clicks that you get.....I'd sure be paying a lower percentage for a higher click cost if I was google...those are the bills that are going to add up quickly, and then leave Google holding the bag when the advertiser does not pay.