also, do the "+" indicate first ticket is one price and companion ticket is cheaper? Take regular game, baseline reserved. It looks like NCMEC is $45, but the green code is GOV18, which is $52 + $15.
The plus means that the second value listed is active on the ticket to be used at the concessions stand. So $52+15 means you pay the $52 and then you get a $15 credit to spend on hot dogs and beers (for that game only).