Postscript to what Zen said: upkeep is not rounded down/up. So if a unit costs 35g, the upkeep is 1.166 (to however many decimal places the programmers track).
Originally posted by Kel: Sorry that it was asked already, I try to read up...searched on the wrong word.
No problem at all. You, unlike many, actually made the effort to do a search first. So I gave you the "proper" word to use. Then Zen came along and played the knight in shiny armor ...