Final Location:
REF ABCD EFGH
You may complete the stages in any order you choose.
Stage 1:
B = The first letter on this sign detailing the building name.
Stage 2:
A = The eigth letter on this plaque expressing how to make a difference.
Stage 3:
C = The difference of the two digit number expressing some school spirit and 78.
D = C.
i.e. if this number were XX then compute XX - 78.
Stage 4:
EFGH = Mr. and Mrs. F's year plus 30.
(This will result in a 4-digit number).
Final Stage:
Standing at stage 4, orient yourself to 147 degrees and enter the building you face. You may need to brush up on your researching skills.
Please exercise stealth while accessing the cache and replace in the correct alpha-numerical location