Dax help

Hi Dronning ,

You need to create a table with dates value to use on a slicer then use the following changes to your measures:

MeasureS1 = IF(
			SELECTEDVALUE('Table'[Date]) IN VALUES(Dates[Date]),
			CALCULATE(
				SUM('Table'[Value]) * SELECTEDVALUE(S1Factor[S1]),
				FILTER(
					'Table',
					'Table'[Supplier] = "S1"
				)
			),
			CALCULATE(
				SUM('Table'[Value]),
				'Table'[Supplier] = "S1"
			)
		)

Chexh file attach.

Dronning My friend MFelix has given an awesome solution, here is another version of the calculation. This will show the total correctly in the table visual if you ever decide to visualize using matrix/table visual otherwise please follow what MFelix provided. Cheers!

Measure S1 = 
VAR __SelectedDates = VALUES ( 'Date Slicer'[Date] )
RETURN
SUMX (
    FILTER ( 
        Supplier,
        Supplier[Supplier] = "S1" 
    ),
    VAR __S1ParameterValue = IF ( Supplier[Date] IN __SelectedDates,  SELECTEDVALUE(S1Factor[S1]), 1 )
    VAR __Value = Supplier[Value] * __S1ParameterValue
    RETURN
    __Value
)