How to remove duplicates as per the date ranges in power query

Hi Team,
I am just trying to formulate for monthly count of the customers which paid over the period.
I was able to formulate for the one with full payments. however if they paid partially over the period, our ERP produce the record of payment date and amount in different lines. in my Power query or excel calculation, I have duplicated records as attached.

Please guide me to get the power query formula corrected.
Solution_MOTH_RADCal_-1.xlsx (34.9 KB)
Many thanks,

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Hi @ammu,

Try the measure below. Assumptions:

  1. A date table exists, with the following columns:
    Month Starting
    Month Ending

  2. The date table is not joined to the data table.

  3. The field in the matrix columns is Date[Month Ending].

     Customer Count = 
     VAR vCustID =
         MAX ( Payment[CustID] )
     VAR vMonthStarting =
         MAX ( 'Date'[Month Starting] )
     VAR vMonthEnding =
         MAX ( 'Date'[Month Ending] )
     VAR vDepartureDate =
         MAX ( Payment[DepartureDate] )
     VAR vReceivedDate =
         MAX ( Payment[ReceivedDate] )
     VAR vPmtType =
         MAX ( Payment[Full/Partial] )
     VAR vResult =
         SWITCH (
                 IF ( vReceivedDate >= vMonthStarting && vReceivedDate <= vMonthEnding, 1, 0 ),
                 SWITCH (
                     TRUE (),
                     ISBLANK ( vDepartureDate ), IF ( vMonthEnding < vReceivedDate, 0, 1 ),
                     NOT ISBLANK ( vDepartureDate ),
                         IF ( vMonthEnding < vReceivedDate || vMonthEnding > vDepartureDate, 0, 1 )

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