By default the money format is something like 10 €. If you want to change that you can do so.
The format is part of the localization files and looks like this:
To get a money format like $10 you need to change it to
You don’t need to change any file here.
Just create a Language Override using the Joomla! Language manager for the front end.
COM_EVENTGALLERY_MONEY_FORMAT as the key for your override.