Summation for Different Data Types in same Column !

Try creating new column like

GB Value =
SWITCH (
        TRUE (),
        [Data_type] = "MB", Total_data/1024,
        [Data_type] = "KB", Total_data/1024/1024,
        [Data_type] = "TB",Total_data*1024,
        Total_data
    )

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Hi, Anonymous 

Based on my description, you may create a calculated column as follows.

GB column 1 = 
IF(
    'Table'[Date_type] = "B",
    'Table'[Total_data]/1024/1024/1024,
    IF(
        'Table'[Date_type] = "KB",
        'Table'[Total_data]/1024/1024,
        IF(
            'Table'[Date_type] = "MB",
            'Table'[Total_data]/1024,
            IF(
                'Table'[Date_type] = "GB",
                'Table'[Total_data],
                IF(
                    'Table'[Date_type] = "TB",
                    'Table'[Total_data]*1024
                )
            )
        )
    )
)

OR

GB column 2 = 
SWITCH(
    TRUE(),
    'Table'[Date_type] = "B",'Table'[Total_data]/1024/1024/1024,
    'Table'[Date_type] = "KB",'Table'[Total_data]/1024/1024,
    'Table'[Date_type] = "MB",'Table'[Total_data]/1024,
    'Table'[Date_type] = "GB",'Table'[Total_data],
    'Table'[Date_type] = "TB",'Table'[Total_data]*1024,
    BLANK()
)

Then you could create a measure as below.

SumTotalData = 
CALCULATE(
    SUM('Table'[GB column 1]),
    FILTER(
        ALLSELECTED('Table'),
        'Table'[Formated Year] = MAX('Table'[Formated Year])
    )
)

Result:

Best Regards

Allan

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