To find this cache you need to visit the cache
Alphabet S - Sound of Music (GCN678) first. There you will find
the values of A and B.
The given coordinates have nothing to do with the cache. You
need to find out who initially said the following three
sentences:
Quotation “C”: “Die Strategie ist der Gebrauch des Gefechts zum
Zweck des Krieges.” Take the last letter of the last name
(surname).
Quotation “D”: “Quod scripsi, scripsi.” Take the first letter of
the name.
Quotation “E”: “Apostreyon thn macairan sou
eiV ton topon authV, panteV gar oi labonteV macairan en macairh
apolountai.” Take the first letter of the English first
name.
All questions refer to the person who said or wrote the sentence
initially—not necessarily in the language of the quotation. Convert
the three letters into numbers (A = 1, B = 2, …, Z = 26). Let us
signify the three numbers by C, D, and E. Calculate
xxx = 291 + A + B + 10 * (C + D + E) and
yyy = 307 + A – B + 10 * (C + D + E).
If either xxx or yyy has more than three digits, drop out the
thousands and use the three least significant digits only. The
cache is located at N 60° 13.xxx’
E 24° 41.yyy’.