Hello, I had a similar issue. So I have two columns, PART AND CUBES, with one to many relationship.(one PART can have many CUBES or a PART can have no CUBE). Scenario: If I select 3 PARTS which have 2 CUBES, wherein 2 PARTS have 2 CUBES and 1 PART has no CUBE. I want a count of all the CUBES plus any PART which has no CUBES.