This is just a note as I figured out how to fix the problem.
Problem: When using the products.variantsingrid.xml.config layout the flag for Hiding the price until it is added to the cart doesn't work.
Fix: in the xml file, add to the select statement at the beginning of the file (in the CDATA block);
Make sure you put the proper comma where it needs to be. After that the flag will work properly.