Nintex Forms - lookup with 2 filters

Hi, I have the following problem:

I'm creating a form for ordering stuff. We have different categories in different countries for maximum costs. We have a list where the limits are defined. It looks something like this:

Country | Category | Reference Price

Austria | A | 1000

Austria | B | 2000

Austria | C | 3000

Germany | A | 800

Germany | B | 1600

Italy | A | 1000

Italy | B | 1900

Italy | C | 2200

which means we have category A for a bunch of different countries but with different prices.

Now what I want to do is have a calculated value that tells the price to the person who fills it, which means I have to filter by 2 variables. How can I do that?

I tried calculated value with lookup but I can set just one filter there.