how much do u charge per:

MB of data transfer
MB of harddrive
domain
pop3 email
FTP account
MySql db
etc


?

depends ;) on your rates...u might wanna look at few hosting companies..compare the prices, do some maths (i am not good at it so i cant tell u :D ) and u would end up with a reasonalble answer to your questions... Keep us updated.. :D