How to exclude the last seven days in Dax

[OhLookAnError]

is there a way to add to this measure to exclude anything in the last seve days?

I tried to filter my data in power query to exclude the last seven days but there doesn't seem to be a way...

 Revenue per Hour =

    Var Hours = Calculate(SUM(tblEnvPerManHr_Summary[TotalHrs]),

                DATESINPERIOD(tblEnvPerManHr_Summary[ReportDate],

                LASTDATE(tblEnvPerManHr_Summary[ReportDate]),-30,DAY))

    VAR Revenue = Calculate(SUM(tblEnvPerManHr_Summary[Revenue]),

                DATESINPERIOD(tblEnvPerManHr_Summary[ReportDate],

                LASTDATE(tblEnvPerManHr_Summary[ReportDate]),-30,DAY))

RETURN

Divide(Revenue,Hours,0)

[andhiii079845]

 Var Hours = Calculate(SUM(tblEnvPerManHr_Summary[TotalHrs]),

                DATESINPERIOD(tblEnvPerManHr_Summary[ReportDate],

                LASTDATE(tblEnvPerManHr_Summary[ReportDate]),-30,DAY))

->

 Var Hours = Calculate(SUM(tblEnvPerManHr_Summary[TotalHrs]),

                DATESINPERIOD(dateadd(tblEnvPerManHr_Summary[ReportDate],-7,day),

                LASTDATE(tblEnvPerManHr_Summary[ReportDate]),-30,DAY))

[OhLookAnError]

This is what I'm seeing for that:

[andhiii079845]

Thank you. Perhaps try to add a VAR for your date

VAR 7day = dateadd(tblEnvPerManHr_Summary[ReportDate],-7,day)

And use it in your measure later? 

[andhiii079845]

Perhaps try dateadd(tblEnvPerManHr_Summary[ReportDate],-7,day) ?

[OhLookAnError]

I've tried to add that to the measure in a couple different spots but cant get it to work. Where would I add that in?