Given the following:
456-345-234-123-2345=56
12x13x14x15x16x17=105
2/3/5/7/9/11x13x17=121
Solve A, B and C for the actual coordinates. The cache is at N 37 30.ABC W 122 17.BAC.
1/2-2/4-3/6-4/8-2/3/A=104
81xB-324/81x1-324/9=105
21x126/6/7/126/C/2/3=109
Good luck!
Oh, and please don't push up the cache when you retrieve it!
Congratulations to kablooey on FTS, and Winterwolfe on FTF!
Big thanks to amago for graciously allowing me to borrow his clever concept!
5/28/13: This puzzle was featured on teamajk's Geocaching Puzzle of the Day!
You can validate your puzzle solution with certitude.