The first stage of this cache is at the coordinates given. When you arrive there, you'll see a red sign with two large white numbers on it, easily visible from your vehicle. You'll need those two digits to locate the final stage of the cache. The final stage itself is a bison tube with only log pages, so bring a pencil. When you arrive at the final stage, you can pretty much park anywhere along this quiet stretch of road. Notice the no trespassing signs about. This shouldn't be a problem, there's no bushwhacking required to find the cache. In fact, you can reach it without leaving the roadway. Because the math used at the first stage is pretty basic, traffic is very light at the second stage, and the cache itself is easily accessible, I'm calling this cache kid friendly.
Below are the partial coordinates for the final stage. Using the two digits from the sign at stage 1, answer the questions below. No calculator needed. Plug in your answers in place of the letters, and you're on your way!
N 42 52.ABC
W 084 09.DEF
A = Subract the second digit from the first digit and plug in the result here.
B = Divide the first digit by 4 and plug in the result here.
C = Double the second digit and plug that number in here.
D = Plug the second digit in here.
E = Multiply the second digit by 3, subract the result of your multiplication from the first digit, then plug that final result in here.
F = Add the two digits on the sign together, then find the square root of that number. Add that answer to the second digit on the sign. Plug your final answer in here.
Congratulations to the Allen Cachers on their FTF!