The code is based on the sum of alphabetical positions of letters, with an adjustment.
Finding the alphabetical positions:
For RING:
R = 18, I = 9, N = 14, G = 7
Sum = 18+9+14+7=48
Code for RING = 50
For ROPE:
R = 18, O = 15, P = 16, E = 5
Sum = 18+15+16+5=54
Code for ROPE = 56
Pattern: The code equals the sum of alphabetical positions plus 2.
RING: 48+2=50 ✓
ROPE: 54+2=56 ✓
For WEST:
W = 23, E = 5, S = 19, T = 20
Sum = 23+5+19+20=67
Code for WEST = 67+2=69
Therefore, the code for 'WEST' is 69.