Hello @fabbstar
I just tried it out and indeed sorting does not work properly if you add $ in front of the number.
I will include this as a feature request and somehow make it so you can add money signs before a cell value.
In the meantime, if you require this feature right away, you can do some custom CSS to include $ the cells, here is how you would go about doing that:
#jtrt_table_82 tbody tr td:nth-child(3):before{
content:"$";
}
1. Change #jtrt_table_82, the 82 is the table ID, change it so it matches the table you want to target.
2. Change td:nth-child(3), the 3, you need to change 3 to the right column number for your price. For example, if the table looks like this:

the price column is the 3rd one, so I would have nth-child(3) as my selector. If your price column is the 6th from the start, use 6.
3. Change content:”$”;, change the $ to the correct money sign you want to display.
This custom css will add $ before your price column, hopefully this helps you out.
I will add this as a feature in the future so others wont have to fumble around with custom css code.
Thanks for using my plugin and for bringing this issue to my attention.
John