Average SUM of selected rows in table

[IAM]

Hello,

I have a table in my report. The selected rows count is shown by 

COUNTROWS(ALLSELECTED(Sheet1))

I also want the average of the Planned costs of that same selected rows in that table.

Is there a measure for this too?

[IAM]

Thanks mate!

[daXtreme · Accepted solution]

[Your measure] =
CALCULATE(
    average( Sheet1[Planned Cost] ),
    ALLSELECTED( Sheet1 )
)