PJM Transactions and Exependiture Type derivation from Cost Elements or from Sub Elements - Is there

Hi,

I want to know if there is any documentation that explains the derivation of the Expenditure Type for PJM Transactions.

As there are transactions that pick up the expenditure type from the Subelements setup and others from Expenditure Types for Cost elements form I think that worth to read documentation to resolve easily the issues related with project costs transfer.

I have a specific issue with the project cost transfer of a WIP issue but I am not clear from the reading of the manual if for this specific transaction the system will pick up the exp type from a cost element OR from a subelement.