Momenta Pharmaceuticals, Inc. (MNTA)

[io_io]

"So, most of the sales for the quarter fell into the royalty structure."
------------------------------------------------------------------
"Well, that would explain it - if the percent of sales that were prior to shift-to-royalty were only 25% (instead of 30%) then the GM would compute out at around 60%. (Which, IO, if you are reading the thread, aligns with the other calculation and is right around my lower bound prediction for a mL, AG and branded split of market.)"

That "other calculation" depends upon assumptions, and you introduce another one here.

But also some sloppy maths to prove the point? You had calculated:

"...(using the 45% profit share for the first 30% of the quarter and then 9% royalty for remainder of quarter). 22-176*0.70*0.09=GM*0.45*176*0.30 ==> GM=45% for the first month of quarter"

So if I use your 25%, then the calculation is:
22-176*0.75*0.09=GM*0.45*176*0.25 ==> GM=51% = not "around 60%".

Funny, I had thought MNTA had a better royalty of 11% not 9% in which case this same calculation comes out to:
22-176*0.75*0.11=GM*0.45*176*0.25 ==> GM=38%