Calculate + ALLEXCEPT + additonal Filter

Hi

I use the following statment successfully As VAR within a calculated column:

=CALCULATE(SUM('Forecast'[Quantity]),ALLEXCEPT('Forecast','Forecast'[Opportunity Number],'Forecast'[Material]))

Present the total quantity by Opportunity Number and Material.

Now I want to include an additional Filter. There is another column "Date" within the table and I only want the total Quantity by Opportunity Number and Material if Forecast[Date] is later than today.

I tried with below, but it returns for all lines the same value ... guess the ALLEXCEPT makes the filter irrelevant

=CALCULATE(SUM('Forecast'[Quantity]),ALLEXCEPT('Forecast','Forecast'[Opportunity Number],'Forecast'[Material]),Filter('Forecast','Forecast'[Date]>TODAY()))

Any idea how to write the formula?

Thank you

Robert