DAX - FORMAT with SWITCH

I have 2 slicers that are used allow the end-user select what measure they want to see:

I am using a SWITCH function to switch between different measures, but I would like to format these as 4 of them are currency and the other 2 are whole numbers. However, when I do this it does not allow me to put the measure into my charts because of the custom formatting:

M_MeasureSelection = 
VAR MeasureSelect = SELECTEDVALUE(MeasureSelection[MeasureType]) & " " & SELECTEDVALUE(MeasureSelection[Measure])

RETURN
    SWITCH (
        TRUE (),
        MeasureSelect = "Booked ADR",
            FORMAT([M_BookedADR], "$#.##"),
        MeasureSelect = "Booked Revenue",
            FORMAT([M_BookedRevenue], "$#.##"),
        MeasureSelect = "Booked Room Nights",
            FORMAT([M_BookedRoomNights], "#.##"),
        MeasureSelect = "Actualized ADR",
            FORMAT([M_ActualizedADR], "$#.##"),
        MeasureSelect = "Actualized Revenue",
            FORMAT([M_ActualizedRevenue], "$#.##"),
        MeasureSelect = "Actualized Room Nights",
            FORMAT([M_ActualizedRoomNights], "#.##")
    )

It does work with my charts when I take out the FORMAT functions:

M_MeasureSelection2 = 
VAR MeasureSelect = SELECTEDVALUE(MeasureSelection[MeasureType]) & " " & SELECTEDVALUE(MeasureSelection[Measure])

RETURN
    SWITCH (
        TRUE (),
        MeasureSelect = "Booked ADR",
            [M_BookedADR],
        MeasureSelect = "Booked Revenue",
            [M_BookedRevenue],
        MeasureSelect = "Booked Room Nights",
            [M_BookedRoomNights],
        MeasureSelect = "Actualized ADR",
            [M_ActualizedADR],
        MeasureSelect = "Actualized Revenue",
            [M_ActualizedRevenue],
        MeasureSelect = "Actualized Room Nights",
            [M_ActualizedRoomNights]
    )

Does anyone have any ideas on this? Any other options or do I just have to remove the formatting?