JReviews is a powerful application for building media rich reviews sites, business directories, services directories, product catalogs, classifieds and any other application you can imagine. It runs on top of Joomla! and WordPress enabling you to build powerful and feature rich sites.
The integration is done thanks to built-in tracking ability. You can track total cost, order ID and product ID.
Inserting the sale tracking code
You should be able to find a section for PaidListings Addon - enter it's Configuration> Tracking. Use the 'Order Complete' section for the sale tracking code:
Save the changes and you are done. It will track every completed listing.
Do not forget to integrate your site with the click tracking code.