This is a bonus cache for the Adventure Lab Pooch Park Perambulation - the cache is not at these coordinates, but you could always have a rest stop while here. Complete the lab to get the numbers A to E, apply the formula and go for it. Not designed to be hard, but links in to a nice walk. Final coordinates are: S 43 52.UEW, E 171 44.XCZ. U = C+E+A, W = D+B+A, X = D+E-B, Z= 3xE-A-B. Enjoy. Or you could try guessing - they are all single digit numbers......