Does anyone know where you can view the income/expense for trading services between cities?
I've seen that "volunteered" vehicles show up in the "other transaction" panel, but where can I see how much my city is paying to (or receiving from) another city for power/water/sewerage?
Are you actually getting income though? The game isn't very good at giving you info about how much your exporting / how often / how much. Click on your simoleon balance and see if there are any "other" transactions from oil sales coming through. If you're getting money, then it is working.