To locate the Final stage of the cache, you will first need to observe the number of nearby palm trees in the sidewalk while standing at the given coordinates. You will use this NUMBER for your North and West offset calculations.
NORTH OFFSET:
Multiply the NUMBER by 2, and then add 2 to that result.
This is your North Offset.
Or to put it another way:
(NUMBER x 2) + 2 = North Offset
NORTH FINAL: ADD the North Offset to the decimal minutes (.xxx) of the North Given coordinates to obtain your North Final Coordinates.
WEST OFFSET:
Subtract the NUMBER from the North Offset
This is your West Offset.
Or to put it another way:
North Offset - NUMBER = West Offset
WEST FINAL: SUBTRACT the West Offset from the decimal minutes (.xxx) of the West Given coordinates to obtain your West Final Coordinates.