Orders table doesn't show correct revenue display

[brianhogg]

Reproduction Steps

1. View the orders table with 7.7.1 vs. 7.7.0

Expected Behavior

Shows revenue amount correctly

Actual Behavior

Shows order amount as a change

This issue has be recreated:

• [x] Locally
• [x] On a staging site
• [x] On a production website
• [x] With only LifterLMS and a default theme