Have slicers and timeline while counting days for event in progress

[didijaba]

HI, I have nice DAX by Alberto Ferrari, but I do not know how to modify it so slicers can be applied? For example, I have table 1 with fields ID, NAME, CITY, TYPE, OPENING_DATE, CLOSING_DATE and I would like to apply CITY, TYPE slicers.

SUMX('Table1';
	CALCULATE(
            COUNTROWS (Calendar);
        Calendar[Date] >= EARLIER('Table1'[OPENING_DATE]);
        Calendar[Date] <=EARLIER('Table1'[CLOSING_DATE])
    )
)