Alternate States using Set Analysis plus additional condition

[Qstradamus]

I am trying to produce a visualization displaying SALES by REGION using two states (Group 1 and Group 2)

   Sum ({"Group 1"}Sales)

However, I also want to filter the sales by a specific PRODUCT (let's call it ABC)
How do I add this to the set analysis?  The following does NOT work:

   Sum ({<"Group 1",[Product]='ABC'>} Sales)

[rwunderlich · Accepted solution]

 Sum ({"Group 1"<[Product]={'ABC'}>} Sales)

[Qstradamus]

That worked.  I can't thank you enough, Rwunderlich