Christmas Cache - The Bonus
Aside from summer, Mrs nscrs favourite time of the year is Christmas. She decided that she wanted to place a couple of caches to go live during the christmas period for a bit of fun. After thinking about what to do, we spotted some festive stamps and decided to set a little letterbox series would be a great idea. Hope you enjoy the caches and have a very Merry Christmas.
This Cache is NOT at the above coordinates, I repeat not at the coordinates!
In order to work out the coordinates for the final hide you will need to collect the letters XMAS from the other caches in the series. Then put the values in the equation below
N 50 21.(M+S)(X+A+S)(X-X) W 004 09.(S+X)S(A+S)

You can validate your puzzle solution with certitude.
