Place the numbers 1-8 in the grid below, one number per circle, such that no two consecutive numbers are adjacent vertically, horizontally or diagonally. Use every number once.
To find the cache:
Multiply the sum of the numbers in the yellow circles by 11, then add the smallest of the four numbers in the blue or green circles. Use this to replace the last 3 digits of the North coordinate.
Multiply the sum of the blue numbers by the sum of the green numbers. Use this to replace the last 3 digits of the West coordinate.