SUMX STRING

Hi Lwpro 

Please try this:

First of all, a table created:

Then add a measure:

MEASURE =
VAR _number =
    ADDCOLUMNS (
        ALLSELECTED ( 'Table' ),
        "Num",
            IF (
                MID ( 'Table'[value], 1, 1 ) = "$",
                VALUE ( MID ( 'Table'[value], 2, 5 ) )
            )
    )
RETURN
    SUMX ( _number, [Num] )

The reslut is as follow:

If the above one can't help you, could you please provide more raw data in your tables (exclude sensitive data) with Text format and your expected result with backend logic and special examples? It would be helpful to find out the solution. You can refer the following links to share the required info:

How to provide sample data in the Power BI Forum

How to Get Your Question Answered Quickly

And It is better if you can share a simplified pbix file. You can refer the following link to upload the file to the community. Thank you.

How to upload PBI in Community

Best Regards

Zhengdong Xu
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