A mod for the game Cities: Skylines that allows you to add or subtract money
This mod adds a text box where you can input a dollar amount and it will add that to your money. Entered the wrong amount? Just put in a negative amount to subtract it.
I'm new to modding this game, and I was unable to change the button icon, but it adds a "roads" button to the end of the toolbar. That will toggle the input box in the top left corner.
Almost all of the code came from either City Vitals or Magic Mapper, so many thanks to them!