quantity after filtered firstdate

Hi Anonymous 

Maby someone can come up with less complicated syntax but until then you can try this, also see the attached.

Measure = 
VAR __EDIOrders =
    CALCULATETABLE(
        GROUPBY(
            Orders,
            Orders[CustomerID],
            "@MaxDate", MINX( CURRENTGROUP(), Orders[Date] )
        ),
    ALL( Orders ),
    VALUES( Orders[CustomerID] ),
    KEEPFILTERS( Orders[OrderWay] = "EDI" )
    )
RETURN 
   SUMX(
       __EDIOrders,
       VAR __maxDate = [@MaxDate]
       RETURN 
       CALCULATE(
           COUNTROWS( Orders ),
           KEEPFILTERS( Orders[OrderWay] = "fax" ),
           KEEPFILTERS( Orders[Date] > __maxDate )
       )
    )