The Numbers is where I get all the figures that I've posted in this thread.
So far BBS has pulled in $14.6 MM, BWABB $5 MM, BG $2.3 MM, ITWGY $3 MM. Add on another 15% or so for Blu-ray sales for BG and ITWGY, we get about $25.7 MM. This is the total revenue in the US.
There was a straw poll on this board indicating that about half of all responders were from outside the US. To be conservative, let's say that the movies pulled in an extra 25% in revenue outside the US. That gives us about $32 MM in revenue.
Fox keeps a pretty big chunk of the sales for themselves -- the only other costs are for promoting the DVDs (which they barely did), shipping them out and giving the retailers their cut. I think we could conservatively say that they kept about 75% of the revenue for themselves (somebody correct me if I'm wrong, I'm starting to pull numbers out of my ass here). So of the $32 MM in revenue, Fox would keep about $24 MM. Since the movies cost only about $10-15 MM, Fox has pulled in a nice profit.