just a rough start for you:
http://www.scientific-computing.com/...velopment.html
This is just one of the first sources on google but it is similar to what I hear by word of mouth. I'd check further tho.
It is creeping up to a billion dollars to develop a drug, half of which can go to clinical trials. In 2000 it was 802 million to develop one, according to this source on cancer drugs. It has to be much more now.
So, you could be looking at approx. half a billion dollars.
paula