Previous Month Showing Blank

Hi! I am new to dax and I can't figure out why neither of this measures are working. 

First measure:

PM Line_amt v2 = CALCULATE([Line_amt],PREVIOUSMONTH('Date'[Date]))

Second measure:

PM line_amt = 
SUMX (
    VALUES ( 'Date'[Calendar YearMonthNumber] ),
    VAR OffsetMonths = 1
    VAR MonthDays =
        CALCULATE ( VALUES ( 'Date'[Calendar MonthDays] ) )
    VAR SelectedDays =
        CALCULATE ( DISTINCTCOUNT ( 'Date'[Date] ) )
    VAR PreviousMonthNumber = 'Date'[Calendar YearMonthNumber] - OffsetMonths
    VAR PreviousMonthFull =
        CALCULATE (
            [Line_amt],
            'Date'[Calendar YearMonthNumber] = PreviousMonthNumber,
            ALL ( 'Date' )
        )
    VAR DaysInMonthSelected =
        CALCULATETABLE ( VALUES ( 'Date'[Calendar DayOfMonthNumber] ) )
    VAR PreviousMonthPartial =
        CALCULATE (
            [Line_amt],
            'Date'[Calendar YearMonthNumber] = PreviousMonthNumber,
            DaysInMonthSelected,
            ALL ( 'Date' )
        )
    RETURN
        IF ( MonthDays = SelectedDays, PreviousMonthFull, PreviousMonthPartial )
)

I have an active relationship between fact table and dim date table:

Please help.