Sort Masonry by Category & Tag (or other)

Hi!

I have a masonry element displaying posts which have several categories such as Blues, Jazz, Rock, Classical, R&B, etc. I have set it sortable by the categories. Looks & works great.

I’d like to make several new pages with a masonry element that sorts all of those categories but only shows the post designated with a specific tag or another category. So I can break them down into pricing levels.

For example:
Display all categories (Blues, Jazz, Rock, Classical, R&B) but ONLY the post that ALSO has the tag or category “Cheap” – so on this page the posts with “Average” or “Expensive” tag/category would not show up even though they do have the Blues, Jazz, Rock, Classical, R&B categories.

Is there a way to either add some code to the parameters in the edit pane of the masonry element? Or some other way to do this?

Thanks!