Compare multiple drop-down list selections then display message

Drop-Down List

Hello, I am building a dynamic form in LiveCycle designer; I am looking for ideas on how to compare multiple drop-down list selections.

I have 1 table with 28 rows each row has a different question and a dropdown menu. The dropdown menus are all the same listing A, B, C, D, E, F and G.

My issue is that I want to compare those selections and then populate either a message box, check box or radio selection based on the following criteria.

If only A’s are selected show message/select 1

If only A’s and B’s are selected show message/select 2

If a combination of A’s, B’s, C’s, D’s, E’s, F’s and G’s show message/select 3

Note: currently each row is not required to be answered

Any help is much appreciated.