Auto populate a text field, based on selections from multiple radio buttons & checkbox?

Hi,

I am hoping someone could please assist me with an issue I am having with a form I am creating.

I have a read only text field that I want to auto display one of four possibilities (A, B, C, and D); all based on what the user selects in various sets of radio buttons and one check box.

I have three sets of radio buttons.

Radio Button Set 1 has two choices (1a, 1b).

I also have one check box (N_A).

Radio Button Set 2 has two choices (2a, 2b).

Radio Button Set 3 has three choices (3a, 3b, 3c).

There are fourteen possible combinations all resulting in one of the four possible outcomes:

1a + N_A = A

1a + 2a + 3a = B

1a + 2a + 3b = C

1a + 2a + 3c = D

1a + 2b + 3a = D

1a + 2b + 3b = D

1a + 2b + 3c = D

1b + N_A = D

1b + 2a + 3a = D

1b + 2a + 3b = D

1b + 2a + 3c = D

1b + 2b + 3a = D

1b + 2b + 3b = D

1b + 2b + 3c = D

Would someone know how to do this?

I have Adobe Acrobat XI Pro and Adobe LiveCycle Designer ES4.

Your assistance is very much appreciated.