This cache is not located at the listed coordinates. To locate the final cache, visit the listed coordinates where you will find a plaque for the Koorda Bicentennial Park. The date the park was opened is referenced on the plaque. Convert this date to a DD.MM.YYYY format and consider this as AB.CD.FGHK.
The final cache is a mint tin located nearby to the posted coordinates. It can be located at S30 49.TUV E117 28.XYZ
T = K/2
U = G
V = D-A
X = H
Y = K-B
Z = H-C