How to exclude ‘aggFunc’ row from the excel export in Ag-grid

Is there a way to exclude bottom row which displays results of aggFunc a column from the excel export.

Essentially, I want to display average on the screen but want to exclude it when exported as that file will be used to import data elsewhere.

Plunker example:

https://plnkr.co/edit/S6tgvSC91MxdGQcZ

Screenshot of the screen and export xls

1. I already tried searching various options on the ag-grid documentation

2. Tried skipFooters and skipPinnedBottom options