Ability to combine cumulative sum with contribution mode

What is the problem or goal the end user is trying to solve or accomplish?

Users would like to be able to combine the cumsum rolling window with a contribution configuration.

How are they solving it currently?

They have to handle such logic in the data level.

What is the recommended solution by the Customer?

Add support to calculate a cumsum with contribution enabled (to display the % contribution of total for each data point).