All Puzzled Up #10 Mystery Cache
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Difficulty:
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Terrain:
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Size:
 (small)
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- THE GEOCACHE IS NOT AT THE LISTED CO-ORDINATES! -
My favourite thing about geocaching is that it brings you to places that you may never otherwise visit. For this last All Puzzled Up cache, the puzzle may not be the hardest but it is our favourite location of the series. You will need to find the first nine in the series in order to find this geocache...hence the difficulty.
Here are the links:
All Puzzled Up #1
All Puzzled Up #2
All Puzzled Up #3
All Puzzled Up #4
All Puzzled Up #5
All Puzzled Up #6
All Puzzled Up #7
All Puzzled Up #8
All Puzzled Up #9
Here is the puzzle:
The closest geocache to this horse has a GC code which is as follows: GC wxyz. If you take the mean of y and z you will end with J.
Using this, and all the other letters obtained from previous All Puzzled Up caches, you should be able to finish this sum:
S (A*B*D*E*H)-(J*F*I*G*D*E)-(I*H*H)+12425
E ((B*H*(C-A-6)*(J+41+D))+(A*G*I))*10-48833
Oh and the terrain changes to 3.5 if wet (the path turns into a creek/waterfall).

Additional Hints
(Decrypt)
[GZ:] Orgjrra n ebpx naq n uneq cynpr.