New User Experience - Roll up the data like Pivot Options

[Arunachalam Angusamy]

Hello Everyone, 

I am working on new use case to roll up the data. I have a custom investment created as (Goal, Strategy, Initiative, Epic) and I have planned cost in all of the level. I achieved the rollup using the hierarchy by connecting these custom investments.

I wanted to group by in Grid View as well in the below format.

What is the best approach that I can proceed ?