Derive a segment from Original labor expenditure typ when Burden on Seperate Line

I have a requirement to derive a segment of my burden cost clearing (burden on separate line) based on the labor expenditure type. I don't see a source to be able to do this. I've gone through the documentation available as well as looked at the sources, nothing stands out as obvious.

Burden on same line is not an option for this implementation right now.

Input appreciated!

Esmeralda