This multi is located on the road to the back gated entrance to the Point Fosdick development. Go to the posted coordinates and collect the phone number on the back of the sign.
Call it (ABC) DEF-GHIJ
Then do the following calculations:
U = A+B
V = H
W = D
X = J
Y = A*C
Z = G
Final location is N 47 15.UVW W 122 35.XYZ.
Finding this cache will help you qualify for GC5D217 The X Challenge