This is the bonus cache after you have visited the five Adventure Labs that take you around historic Featherston. The small Wairarapa town lies on the eastern side of the Remutaka Ranges and is the gateway to other towns in the region including Martinborough and Greytown. There are lots of interesting shops, historic buildings and museums to visit before you venture further east. The bakery has tasty gourmet pies which are strongly recommended as are the roast dinners at the end of a long geocaching day.
To find the bonus cache you will need to gather the five clues A-E in the Adventure Lab and solve these equations.
The link to the Adventure lab is here: https://labs.geocaching.com/goto/c6f7b42b-ae74-438e-8e0b-0634f752da04
The cache can be found at South 41 JK.LMN East 175 RS.TUV where:
J = (D/E)-C-B
K = C+E
L = A-(C*2)
M = C-B
N = C+E-B
R = A/E-B
S = D/D
T = (D/E)-E
U = A-B
V = D-(C*E)-B-B