The total buyout includes Pandemic.
Looking just at revenue, if a game sells for $60 and they sell a million copies, that's $60 million in revenue.
I don't know how much development costs are for games now-a-days though so I can't comment how much of that would be pure profit, and there will be markups for the distribution of the game, so obviously EA won't make anywhere near $60 per copy of the game sold.
In the first twelve months of release, Mass Effect sold roughly 1.4 million copies according to VGChartz. I'm guessing that is pretty solid profit there.