The cache can't be found at the posted published coordnates.
Work out the missing numbers to the soutison of the number problems on the grid from A-F.
Here are some tips that might help you to solve this puzzle.
The missing values are the whole numbers between 1 and 9.
Each number is only used once.
Each row is a math equation.
Each column is a math equation.
Remember that multiplication and division are performed before addition and subtraction.
Once you have work out the missing numbers then you must now work out the formula below.
The final coordnates for the cache can be found at:-
N51. A B. ( D - C) (( F - D) + A) B
W002. (D - A) ((D - E) - B) . B ((A - B) - C) (F + C)