There are a couple of ways to check the Revenue per Event:
In the Event List Report
From the Booking Summary
From the Event List Report:
Click on Reports
Click on Event List
Click the edit Columns button in the top right corner
Select the appropriate revenue Columns for your needs
Click Apply
From the Booking Summary:
Click on the Booking
Navigate to the Events section
Click the edit Columns button
Select the appropriate Revenue Columns (subtotal, taxable subtotal, total, etc)
Click Apply