This is a standard puzzle where you need to find the value of each letter then put it into the formula to find the cache co-ords.
A = South Africa + England
B = France x Sweden
C = (Canada x Canada) - Germany
D = Togo / Greece
E = Australia x Norway
F = Palau + Nepal
G = USA x Switzerland
H = Barbados + Qatar
N 51 4A.BCD W 000 3E.FGH
Good luck!