Pip is correct in that in general you cant account tech cost to unit cost. As each tech has different subjective value between unlocking upgrades abilities and units.
However the exception here imo is that with molly and at nade tech no other units benifits from this and no other units can be unlocked with this. It only and soley benefits conscripts. It used to be even more expensive and seperated.
Only in this case it can be added to unit cost. 4 cons is meta 3 is close to being meta. Divide to cost by 4 and add up, then put in the 50 muni and 18mp for each 7th man and we have quite an if not the most expensive but fantastic main line squad in the late game.
I'm not sure about even that, honestly. I'd still consider the Molly/AT grenades to be general teching, and their price should be added to the Soviets' "Total tech costs" to reach certain tiers/units, rather than being considered part of an unit's cost (Even if it does affect only a certain squad)
My understanding is that these allied techs are pared out from the regular tech costs in order to make allied teching more "flexible". I.E; You're supposed to be able to get Molly/AT earlier than OST/OKW can get their grenade + snare (As they require BP1/a tech truck to be built, respectively) OR skip that tech in order to be able to reach your T70 or medium tank more quickly.
To this end: Molly/AT + tier 3 should cost slightly more than OST BP1 and tier 2 (To account for the flexibility afforded by them being split), but going for tier 3 without Molly/AT should be discounted when compared to BP1/tier 2. (Assuming everything else is equal, of course. Raw MP/MU/FU pricing for things can be a little misleading sometimes)
How do the numbers work out at the moment, actually? I haven't looked at tech costs in a while. (Ignore healing for either faction for now)
I hope that, even if you still disagree, you understand why I (And to my knowledge; The Balans Teem) consider this the case.
EDIT: As a last thing: honestly, even if you might consider these techs part of Conscripts' cost: I do think they're the best/most cost-effective mainline squad in the game.