$60,000 usd a year list price.
0. http://www.medicalnewstoday.com/articles/159552.php
1. https://www.scientificamerican.com/article/cost-to-develop-n...
I'm pretty sure the $2.5 billion/drug includes R&D "wasted" on failed drugs too. The industry gets 20-30 new drugs approved per year, and spends around $60 billion per year developing them. I mention this because one could easily see that figure and think that they'd need to make, say, $25 billion just to break even after paying for all the drugs that never made it out of development.
I do agree with your analysis, but it's a weak argument to incentive.