@OwenAuger came with a solution that I tried and this works:
Sales Amount Other Total Only = IF ( NOT ( ISFILTERED ( Sales[Customer] ) ); [Sales Amount Other] )
I saw in your example that it has totals and every else is empty, but in my example everything is empty even the totals. I used your example: Sales Amount Other NO EXCEPT WITHOUT VARIABLES.
The formula works:
Uitval Top Overig = CALCULATE([Selected Top N Value];
KEEPFILTERS( ( FILTER ( ALL('ANG Fouten'[LPP_NAME]); NOT (CONTAINS( TOPN([Selected Top NNumber]; ALL('ANG Fouten'[LPP_NAME]);[Selected Top N Value]);'ANG Fouten'[LPP_NAME];'ANG Fouten'[LPP_NAME]) ) ))))
But there is also a formula to get only the total of the other group:
Uitval Overig Totaal = IF (( NOT( ISFILTERED ( 'ANG Fouten'[LPP_NAME] ) );[Uitval Top Overig]))
And that formula doesn't work / gives a empty result. @OwenAuger Can you help me with this?