Multiple content-controlled look-ups

I need to calculate a term using 3 other content-controlled boxes. # of stories on a house (1, 1.5, 2, 3), how well-shaded (well, normal, exposed), and a climate area (1, 2, 3, 4). I know I'll be nesting statements but am unsure how to join them together without error messages. Table to pull from is below. Semi-new to excel. Thanks!

N-values # stories
Zone 1 1.5 2 3
1 Well 18.6 16.7 14.9 13
Normal 15.5 14 12.4 10.9
Exposed 14 12.6 11.2 9.8
2 Well 22.2 20 17.8 15.5
Normal 18.5 16.7 14.8 13
Exposed 16.7 15 13.3 11.7
3 Well 25.8 23.2 20.6 18.1
Normal 21.5 19.4 17.2 15.1
Exposed 19.4 17.4 15.5 13.5
4 Well 29.4 26.5 23.5 20.6
Normal 24.5 22.1 19.6 17.2
Exposed 22.1 19.8 17.6 15.4