How to enable eCommerce tracking for Ecwid

1. Register a new GA account if you don't have one.
2. Add your site.
3. Get your Web property ID. See how to do it - here. 
4. Enter this ID on the Ecwid Control Panel → Settings→ General → Store Profile page, "Google Analytics Id" option. Save the changes.
5. Enable the "Ecommerce tracking" option in your GA settings. Please refer to these help articles for details: support.google.com/analytics/bin/answer.py?answer=1037249  and support.google.com/analytics/bin/answer.py?hl=en&answer=1009612&topic=1037061 

*** Important note: you don't need to modify the tracking code to enable this feature, you should just enable it in the Google Analytics backend.