Well I used to compare after market tax without expenses. I think that is reasonable so for techer ~1/3 tpt/acre and tech sells at 3000 means $1k/acre/turn except I would add tax income to that. Techer naturally stands out but it used to be quite informative to see at what market prices different strategies/govts were competetive.

Thing is I don´t remember the formulas and some of them seem to have changed since last I played (swirve days).