Fix Matrix Total in Dax Measure

Dear Power BI Community,

I would like some help to fix the calculation of a total in a matrix visualisation.

As you can see in the table below, the total for « Starting Amount » in 2023 is not working :

Here is my measure :

StartingAmount=
    CALCULATE(
    Sum(Amount),
       PREVIOUSYEAR(DIM_DATE[Date]),
       DIM_DATE[MoisNom] = "Dec"
)

I found a solution using the SUMMARIZECOLUMNS function, but this way is not very practical (I would like to use a measure without creating new table in my model). Do you have an idea ?

Test_SUMMARIZECOLUMNS =
SUMMARIZECOLUMNS(
    DIM_DATE[Year],
    DIM_DATE[Month],
    "Amount",[Amount],
    "StartingAmount",
    CALCULATE(
        [Amount],
        PREVIOUSYEAR(DIM_DATE[Date]),
        DIM_DATE[MoisNom] = "Dec"
    )
)

Kind regards,

David