I'm trying to set up my own little hosting provider. But i don't know what to price people.

I want to offer a package that is adjustable. It includes ASP, CGI, Perl, PHP and X ftp accounts/customer. Also X pop3 accounts/customer. They get Xmb/customer webspace.

Now I want a formula that creates a reasonable price both for me and the customer. Like, 3 times the mb amount plus the.... blablabla etc etc. Can you guys help me on this? I tried a few but i wasn't really satisfied with my own results