Let’s break it down:
A = 26, the sum of the letters' positions in the alphabet for "SUN" is \( S = 19, U = 21, N = 14 \), so \( 19 + 21 + 14 = 54 \), and the sum for "SOFA" is \( S = 19, O = 15, F = 6, A = 1 \), which gives \( 19 + 15 + 6 + 1 = 41 \), so the correct answer is 29.