Calculate Sum of Daily difference

[MNM]

Hi Team,

Good day! 

Is there anyway to get the sum of daily difference from daily total amount?

(1) I am using below dax to get the daily difference but stuck in getting the correct dax to get their total sum of difference and sum of difference per region.

Daily Clearing =

VAR PrevDate =

    MAXX(

        FILTER(

            ALL('TS Raw'[Reporting Date]),

            'TS Raw'[Reporting Date] < SELECTEDVALUE('TS Raw'[Reporting Date])

        ),

        'TS Raw'[Reporting Date]

    )

VAR PrevSum =

    CALCULATE(

        'TS Raw'[Past Due],

        FILTER(

            ALL('TS Raw'[Reporting Date]),

            'TS Raw'[Reporting Date] = PrevDate

        )

    )

RETURN

    IF(

        PrevSum <> 0 && 'TS Raw'[Past Due] <> 0,

        PrevSum - 'TS Raw'[Past Due]

(2) alsio I tried using a slicer with Month but it doesnt seem getting the 1st day of each month? is there something wrong with my dax?

Thank you!

[lbendlin]

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-...
Please show the expected outcome based on the sample data you provided.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523