Thank you Vicent For your quick reply. I was implementing that solution has a 2nd choice already. I didn't want to pick 2 combo boxes every time but probably tha'ts the only way i recon? I was thinking about using 4 variables and depending on which ( using a Switch) i would have 4 agregates each filtered by each variable, but i think this might be too messy? Using 2 combo boxes might be the ideal ( altough it doesn't match the requirements i was asked for to do).
Here you can see what i used (2 combo boxes) and what i wanted ( 3 on the right)