Create Measure Unaffected by Slicer(s)

I have a dataset similar to below. Each row represents an event and the Count column is always populated with a (numeric) 1.

I'm trying to create two measures counting the number of events, one that's affected by slicers on EventType and Flag_YN, the other affected by Flag_YN only. It should be fairly simple but I just can't get it to work. 

For example, if a user has Flag_YN = Y and EventType = A, what I would like displayed is "2" and "8".

I've tried:

EventLevel = CALCULATE(SUM(Table[Count]),ALLEXCEPT(Table,Table[Flag_YN],Table[EventType]))

EventLevel = CALCULATE(VALUES(Table[Count]),ALLEXCEPT(Table,Table[Flag_YN],Table[EventType]))

EventLevel = CALCULATE(COUNTROWS(Table),ALLEXCEPT(Table,Table[Flag_YN],Table[EventType]))

Also tried the above with REMOVEFILTERS. For the Flag_YN level measure I tried the above with the EventType portion removed.

No matter what I try both measures change with the EventType slicers and end up displaying the same numbers. What am I overlooking here? Would appreciate any help.