I am setting up Google Adwords conversion tracking and would like to use the purchase prices as the conversion value, as described here: https://support.google.com/adwords/answer/6095947
What is the expression that represents this value that I can add to the tracking code?
If I understand correctly, the purchase prices are not expressed in values available for tracking code. This would require some custom PHP development to add those. Do you have a PHP developer on your team? If so, they could use the same hooks featured here that shows how to add other things to the Thank you page.
If you need a PHP developer to assist with this, I can recommend contacting one of the developers here: