I need some help choosing billing software. I run a webhosting and domain registration company but we also offer some offline products such as computer hardware. So i need a program that has the features of WHMCS but with the option to add more than one item to the cart at a time?

The other feature that i am looking for is that software is able to look record company expenses and purchases that i make.

I would also like it to be able to handle stock and show how much of each product is available. This is not required but it would be a bonus if the product could do this.

Is their any software that will do all of these things?

me too, i'm looking for this...

specially...with a domain search

I think AWBS is suitable for your needs.

WHMAutoPilot (http://www.whmautopilot.com) has also a Shopping Cart... maybe you'll want to take a look.

WHMAutoPilot (http://www.whmautopilot.com) has also a Shopping Cart... maybe you'll want to take a look.
Yeh, that would be better for your needs and easier to use compared to awbs.

Yes, the customization of AWBS is harder than all other billing softwares. It includes hundred and hundred template and language files that you'll need to modify. Also most times many bugs occur on AWBS. So you'll need to update it periodically.

Lots of security issues in AWBS too - they are frequently releasing security updates that need uploading.