how sell my app on appStore (USA) please ?

Hello.
almost I already finish my simple application to sell it in appStore.
now, my question is :
if I live in Central America, How can i do to sell my application in appStore (USA) please ?

What are the steeps to do all the proces please ?
thanks a lot any comments.

Everything you need to know should be right here:
http://developer.apple.com/iphone/