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Day to day Difference

Good day, 


I am trying to calculate the day to day difference based on weekdays only, for my daily banking movement. 

I have would like the table to look as follows:


I used the following formula to calculate the difference but it does not take into account the weekends, how can I change my formula to exclude the weekends from the calculations and only base it on weekdays.


Movement =
        SUM('BST_INPUT'[Per Collect]),
    SUM('BST_INPUT'[Per Collect]) - __PREV_DAY
Helper I
Helper I

Hello. Try adding the WEEKDAY function to your formula, 

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