Claim triangles in PowerBI

To explain the 2nd point further. I have added the 'Reporting_date' column directly in my data. It is a sum of the 'Time_claim_occured' and 'Time_units_delay' where the delay is in quarters.

My matrix visual now looks like this:

And the measure calculation looks like:

Sum X Quarters = 
VAR xQuarters = SELECTEDVALUE('Claim Development Quarters'[Claim Development])
VAR xDates = SELECTEDVALUE('Claim Occured Date'[Claim Occured Date])
VAR Result =
    CALCULATE(
        [Total sales],
        Triangle[TIME_UNITS_DELAY] <= xQuarters,
        Triangle[TIME_CLAIM_OCCURED] = xDates
    )
RETURN
    IF(Result = 0, 0, Result)

How can I write in the measure the IF statement or something similar? It should 'calculate until' the 'reporting_date is <= to the xDates. I tried including this in the CALCULATE, but it returns weird results.