It doesn’t matter what skills you’re training while using accelerators, because the gain you get from them is linear.
It’s a very simple calculation:
(primary attribute + (secondary attribute/2)) * total minutes = total SP
So if it’s a “Standard ‘Boost’ Cerebral Accelerator (+4 to all attributes, lasts for 4 day’s or 8 days with the Biology 5 skill)” then the calculation would be:
(4 + (4/2)) * 60 * 24 * 8 = 69,120 SP
Doesn’t matter if you’re training off-spec, because the gain is always going to be that set number.
That said, yeah, I do think that CCP needs to simply show the final figure, and probably get detach the biology skill from training boosters and baseline the benefit since it acts like a hard requirement like the old learning skills did.
Also, groan at the grammar mistake in their own store copy.