Billings: How do you send a 'normal' (non-timed) invoice for sold inventories on a flat-fee basis?

I purchased Billings 2 a while ago and haven’t had time to look further into it until now.

I know it’s geared towards service type of businesses and timed slips, etc. But one would expect form such a well-merited program, that it can also let you create normal invoices, for products sold.

In my case, I have an Edirol R4 portable field recorder that I’m going to sell to another company. I can’t for the life of me, figure out how to make a common standard invoice for this purpose, in Billings 2…

If anyone can help me out, I’d be very thankful. I felt going through Marketcircle’s support forum would take too long time, and I was thinking that asking in Fluther might bring me the answer quicker. :)