Only tip I have is to call MSActivesource, Biogen's patient support people. Doubt they can simply hand you a price over the phone but can tell you where to start their financial support process. 1-800-456-2255

The process is time-consuming. It seems things sit and wait until someone (you, me) calls and prompts action. I called them yesterday to see where my application stood. Seems it was waiting for "prior authorization". They have the prescription - why the "prior authorization" is needed separately I'll never know. But apparently it was waiting for me to call and prompt...something...to move.

Good luck! I've been at this since April 4th.