I have these tables:

DimDate = 
DATATABLE (
    "Date", DATETIME,
    "First of Month", DATETIME,
    {
        { "01-01-2024",  "01-01-2024" },
        { "01-02-2024",  "01-02-2024" },
        { "01-03-2024",  "01-03-2024" },
        { "01-04-2024",  "01-04-2024" },
        { "01-05-2024",  "01-05-2024" }
    }
)

And this Fact:

Fact = 
DATATABLE (
    "Date", DATETIME,
    "Amount", INTEGER,
    {
        { "01-01-2024",  10 },
        { "01-02-2024",  20 },
        { "01-03-2024",  30 },
        { "01-04-2024",  40 },
        { "01-05-2024",  50 }
    }
)

With a simple relationship between the two:

I have this simple measure:

Amount = sum('Fact'[Amount])

And this cumulative measure

Amount Rolling = 
VAR MNX = MINX( ALLSELECTED( 'DimDate'[Date] ), 'DimDate'[Date])
RETURN
CALCULATE (
    [Amount],
    FILTER (
        ALL( 'DimDate'[Date] ),
        'DimDate'[Date] >= MNX &&
        'DimDate'[Date] <= MAX ( 'DimDate'[Date] )
    )
)

On the canvas is the following visuals:

I want the measure to return 70 rather than 40 – so the minimum date of the slider is 01-03-2024 so I want the measure to always return the cumulative total from the minimum date of the slider – effectively the sum of this window:

I understand that the slicer for First of the month is having an impact but is there any way to adjust the DAX to give me the result I want?