My current research strategy is to always choose cheapest first of the set of techs I want, but trying to calculate cost of various productivity techs with circuits seems near impossible (can't use fractions (1000×1.5^Level)) so I was wondering if the mod could provide those values somehow? Perhaps Research Analyzer could have alternate output mode?

Would it be acceptable if this was a startup setting and not changeable in game?

Were I start a new game then yes, it would be ok. But I went and installed this mod when my research prod tech is already at level 29, and its cost can be only be calculated up to level 11 using any sane math before overflow becomes limiting factor. So no, startup setting is not really ok option here.

are you looking for cumulative cost of all levels of the tech or the cost for the next level? circuit signals are limited to 2.147 billion

Cost of the next level.

added as a setting in version 1.3.0

Thank you! Now this is truly automated factory.