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Count Working Days with Month and Week Starting Slicer Filters

Hi Power BI Community,


I am having trouble with a measure that calculates number of working days based on my date calendar.  When I use a slicer that has only the month it returns working days as intended, when I use a slicer that has only the start week, it returns days as intended. The problm is when I have a slicer that has Month and Start Week.  It seems that when the slicer has both and I select a week, it defaults to the month. See measures and examples below. 


If anyone can please help, I've tried several different approaches but none allow me to have Month and Week in a single slicer 😞


Date Master Table: 
AddIsWorkingDay = Table.AddColumn(AddMonthWeekStartNumber, "IsWorkingDay", each if Date.DayOfWeek([Date], Day.Monday) > 4 then "Weekend" else "Weekday")
Number of Working Days =CALCULATE (COUNTROWS('Date Master'),'Date Master'[IsWorkingDay]= "Weekday")





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