Part One:
Using the numbers 1 thru 12 only once each, fill in the blank tiles of the puzzle grid below. Each row is designated A, B, C, D or E. Each column is designated 1, 2, 3, 4 or 5. The sum of all numbers in each row much match the value given at the end of the row, and likewise for each column. In addition, each diagonal (shaded in gray) must equal the value given at the end.
Part Two:
Solve the equations below using the letter/number combinations in each equation to match the number found in the corresponding grid tile from Part One.
a = B5
b = (B1*C3)/E2
c = (C2/B5)*D5
d = (E1-B2)+A4
e = E4
f = E4 + D5
g = (B2+C2)*C3
h = A4*(C3/D3)
i = C2-B5
j = C3
k = B5/D5
l = C3/(B2+C4)
m = D2
n = E4/B1
o = B1*D5
Part Three:
Use the answers from Part Two to substitute the corresponding letter below. Once finished, you will have the actual coordinates for the final stage of the cache.
North: ab cd.efg
West: hij kl.mno
You can check your answers for this puzzle on GeoChecker.com.