Matrix Row and Columns Subtotal are not calculating correctly

Hi Vayne-Daryl, Hope you are doing good!

Please try the below measures

Test Measure =
VAR CurrentFiscalYear = SELECTEDVALUE('Calendar'[Fiscal Year])
VAR StartFiscalMonth =
CALCULATE(
MIN('ApplicationCost'[StartDateFiscalMonth]),
FILTER(
'ApplicationCost',
'ApplicationCost'[ApplicationName] = SELECTEDVALUE('ApplicationCost'[ApplicationName]) &&
'ApplicationCost'[Control Number] = SELECTEDVALUE('ApplicationCost'[Control Number]) &&
'ApplicationCost'[FiscalYear] = CurrentFiscalYear
)
)
VAR Result =
SUMX(
'ApplicationCost',
IF(
'ApplicationCost'[FiscalYear] = CurrentFiscalYear &&
'ApplicationCost'[StartDateFiscalMonth] <= MAX('Calendar'[Fiscal Month]),
'ApplicationCost'[Value],
0
)
)
RETURN
Result

Final Measure =
SUMX(
SUMMARIZE(
'ApplicationCost',
'ApplicationCost'[ApplicationName],
'ApplicationCost'[Control Number],
"MonthValue", [Test Measure]
),
[MonthValue]
)

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