http://www.freewebs.com/masterpikachu/ZC%20Content/Incomplete%20Quests/LOZ-Generation4.qst
If Link has any items in the Wealth Medal Item class, the toll for the 'Leave Money Or Life' Room type says -1 instead of the amount set for that screen.
However, Link still pays the full amount that is set; in other words, the Wealth Medals do not affect the toll set for a 'Leave Money or Life' Room.
NOTE: The first sentence explains what the bug is all about.
The second sentence has nothing to do with the bug.