A = How many times is 'REST' mentioned?
B = The number of E's mentioned divided by 2.
C = How many dots are on the letter I plus 2?
D = How many numbers are on the headstone less 7?
E = How often is the letter Z used plus 6.
F = How many horse shoes can be seen multiplied by 4.
The cache can be found a short walk away at S 37 32.ABC E 143 51.DEF
Checksum S=26, E=37