Expense (PR05) - Line item change report

Question

Hi:
We are looking for a report on the changes made in the trip line items after the trip was submitted, approved, transferred to FI (at every status).
Basically if a consultant has submitted an expense and is approved by the manager, Then if consultant is opening that trip again and making the changes in the line item (change in cost object, amount etc) or adding a new line, we need  a report which tells when was the change made, what was the change etc.
With the custom program, we are able to get the trip status history but not the line item details (change).
Any suggestions.

Answer 1

It tells the status of the trip but doesn't tell me what change is made.
For example:
If the original trip had one line for Airfare (say 1000) which was approved and transferred.
Later on this was adjusted to Airfare (say 1010) which was again approved.
We want to know amount was changed from 1000 to 1010 on this date. Similarly to cost assignment. Any field which has accounting effect.
Basically our Accounts payable needs to know if they should settle the expenses without waiting for the receipts at month end (in the scenario where cost object is changed later but amount is same, so there is no revised receipt from consultant. They can just settle it again)
Some kind of report which tells when and what change was made (at item level).
Thanks.
Rahul