What I had been using was Dyanmic price Updater and https://www.zen-cart.com/downloads.p...=597&styleid=4 (which I know is a bit out of date).

It does show on my test site

Click image for larger version.  Name: ss1.jpg  Views: 51  Size: 27.2 KB  ID: 18898

and then when the page is fully loaded, it replaces with this

Click image for larger version.  Name: ss2.jpg  Views: 46  Size: 33.0 KB  ID: 18899

The piricing for both did update when options/quantities were changed.

I hope this helps. Please do let me know if you would prefer to see the site live.