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: COM_EVENTGALLERY_MONEY_FORMAT="%2$s %1$s"
.
To get a money format like $10 you need to change it to COM_EVENTGALLERY_MONEY_FORMAT="%1$s%2$s"
.
You don’t need to change any file here.
Just create a Language Override using the Joomla! Language manager for the front end.
Use COM_EVENTGALLERY_MONEY_FORMAT
as the key for your override.
All prices include VAT. The gross price will vary depending on the selected shipping country.