ZBrushCentral

Plz help me

I am interested for buying zbrush 3.5 with academic licence. Could anyone tell me the cost and from where i can buy…i am in india.

Few questions in my mind…

1.Can i upgrade my academic licence to Commercial anytime or not?
2.all upgrades will be free or not?
3.whats the diff between Academic licence and Commercial licence?
4.can i buy from pixologic online store or not?

Thanx :slight_smile: