Hi,
Try as follows:
** if you have only Revenue by sales,Revenue by other sources & Gross Revenue (Local member ) in a row axis
then local member attached to Row axis. By using this option your local member will be always at end of the row axis even if you drill down.
**If you have more accounts apart from above 2 and local member then create one more report for rest of the accounts
-->Create default report with 2 accounts (Revenue by sales & Revenue by other sources) in rows and create a local member Gross revenue (attached to Row axis)
-->Create a new report sharing column axis with default report and add rest of the accounts.
Using this method default report will get expanded with new report accounts after local member of default report.
Hope it helps...
regards,
Raju