To anyone looking to make updates to the currency with PowerStore you should use the document as a guide for this. There is no need to all of the $ that you see in the code. In php the $ is used for variables so there are many of them and almost all of them have nothing to do with the currency being displayed.
You should only be concerned with the $ that are used as a currency symbol. The document covers almost all of these specific pages and areas to update. Any that are not referenced with a specific line number should only be updated if you see them in the design view for that page.
If you go through the doc and still have currency symbols that are not updated please let us know and we will help you with it.