For those of you who operate a hosting site that also sells domain names.. do you charge for the two services seperately or all at once?

For example, if a customer goes to your website and they want to buy a hosting package AND a domain name... do you first route them through your domain purchase system and then through your hosting purchase system?

So they would end up with [/b]two[/b] credit card transactions?

Thanks for your help.

Currently, my clients are being charged seperately...but I am looking into registering the domain myself and charging my customers all on one bill.