Dumb Steeple

Dumb Steeple is a Grade II listed monument situated in an open grassy space in the center of Grangemoor Village, West Yorkshire
Little is known about this monument however there is an information board next to the monument provided by Kirklees Council which gives some details and possible speculation about its purpose.
In order to find the cache you will need to examine the information board and the monument and answer the following questions
A: Third digit of date in the inscription in stone on the southern face of the monument
B: Number of screws/rivets around the perimeter of the notice board minus 3
C: First digit minus third digit of the four digits on the front of the railing's padlock
D= last digit of the four digits on the front of the railing's paddlock
E= Last digit of the year of the most recent restoration minus the first
F= What grade is the listed monument?
If you have the correct answers the numbers should total 25
The cache can be found at N53 38.ABC W1 40.DEF