Allocation Rule Creation

Summary:

I have a below scenario to create a allocation rule please let me know can we create allocation rule to get the below desired output.

Content (required):

It should be sum of period activity of multiple GL's and after that we need to calculate 15% of that amount and generate an target debit and credit amount.

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

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