From: Berlin, Germany
By cost, not by sub-type. Got it. Thanks!
Both. Assuming sub-type means ART, AT and AA and cost means cost in build points :)
e.g. there are separate force pools for ART3 (leg-mover field artillery) ART4 (mot-mover field artillery) ART5 (rocket and rail artillery), ART6 (self propelled guns), AT3 (leg-mover anti-tank), AT4 (mot-mover anti-tank), AT5 (tank destroyer), AA4 (leg-mover anti-air) and AA5 (mot-mover anti-air). And you should be able to choose from them separately during production.
“WiF is like sex: sure, it may give some practical results, but that's not why we do it.”
- Richard P. Feynman, 'WiF, Sex, and the Dual Slit Experiment'.