Order of FILTER function

Good day,

I'm looking for some DAX help. 

Edit: added sample 

My model looks like:

So note the facts (actions) are connected to a bridge table instead of directly to dimensions. This bridge is a crossjoin of both customer & product. In order to find the right action for the customer/product combination, I'm using DAX.

But now I'm faced with a challenge I can't seem to figure out. Though it shouldn't be so hard.

With a measure I would like to search for a 'Action'[Price] for a product/customer combination. The criteria are:

- I want to return a blank if no relationship with 'Action'[ActionKey] could be established (red)

- If there is a relation (second filter), I want to filter out the lowest 'Bridge'[Max] for each [ActionKey] (orange)

So after aplying the filters, I should have a virtual 1←1 relationship.

I tried several options but I can't figure it out. Basicly the syntax below should work in my opinion, but it seems like the filters are being applied symultaniously which gives incorrect results.

ActionPrice = 

VAR _filter = 

   FILTER ( 'Bridge', 

      RELATED ( 'Action'[Price]) <> BLANK () &&

      'Bridge'[Max] = MAX ('Brigde'[Max]))

RETURN

CALCULATE ( SUM ( 'Action'[Price] ), _filter)

The filters seem to work correct individually, but not the combination.