Cross Reference Multiple Inputs

I need to write an Orchestration that looks at a combination of fields to produce a single output. I will be performing a data request for any customer records where cat code 3 is not populated. It will look at the values of Cat Code 10 + Cat Code 13+Cat Code 08 + Country depending on the combination of those values it will cross reference to a single value for Cat Code 3. I understand that I could enter all of the possible values of a single field (ie US|DE|GB) and cross it to a single value but how would I enter the combination?