Field or attribute to get Invoice Total Amount in BPM rule

Summary:

Hello All,
I need to write a BPM rule for AP Invoice which is based on total cost of the Invoice. If total > $2500, then Invoice should go to X for approval.

When I am searching the matching field / attribute, I did not find anything like Invoice Total Amount etc. rather I see attributes like:
'Cost Center Total' , Invoice Line Total, Distribution Total

PFA screen shot. Can someone please suggest which field I should use?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):