Talents Pattern for Cost/ratio/rank

Hi guys ! Since I am really rusty with all the version of WOW there is so many possiblities, also, being on a private server we can have different Pattern then on the blizzlike version of the real retail verison.

so here is my question #01 ;for our server of WOTLK - Lordearon, blizzlike warmane server ;

The re-specing feature cost gold, evertyime you do re-spec the price goes up, I am not sure if I remimber right but I think in retail it was going down 1 rank of price per 7days, Is this pattern still working and what kind of pattern is there for us ? :)

Thanks alot !

ps; I think I remimber the cap was 100g per re-spec at maximum rank. question #02 what is our Cost Cap ?