Very nice FTB!

Now to ball park cost, use this assumption and create a none-linear table of cost.
5% 4+1 totaled a total cost increase of 90 million to our PWA. So do that for 2011 and 2012 and know that 5% of this years equated to 90 million but 5% next year will be more. So what is X?

Simple math states the contract income costs are about 1.89 billion for 2010.

So
2011 =1.9845b
2012 = 2.08373

Now
20%=2.5b
30%=2.70b
40%= 2.917b
50%= 3.125595b

Simple compounding used, for simple illustration.