How can I pay the authors of documents I sell?

[Ettuvian]

I will be selling .pdf files. I need to be able to pay the authors (who may also be customers), who contributed the documents to my site, a percentage of the sales each month. The sales must be tracked by document and author for payment. I would like this to be as automated as possible. What is the best way to

1) track the .pdf sales by document and author

2) pay the authors a percentage of sales each month
using Zen Cart?


I have not installed Zen Cart yet. I am trying to see if it meets my requirements.

[stevesh]

Tracking the sales can be done, but not the payment part. Zencart has no provision for remitting payments, just receiving.