Coordinates will take you to a sign on the trail with several plaques on it.
From this sign you will get your information to the final of this two stage multi cache.
For the final:
N42 23. ABC
W090 25. DEF
A. Total number of plaques on the sign - 3.
B. Total number of plaques in top row.
C. Total number of plaques in bottom row.
D. Total number of plaques in top row x 2.
E. Total number of plaques in bottom row - 2.
F. Total plaques -1.