Wisconsin is made up of 72 counties, this cache is focused on Green Lake county. Green Lake County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 19,051. Its county seat is Green Lake. In 2010, the center of population of Wisconsin was located in Green Lake County, near the city of Markesan. Here are a few stats about Green Lake County, courtesy of Wikipedia. You can learn more about Green Lake county at: https://en.wikipedia.org/wiki/Green_Lake_County,_Wisconsin
This county's oldest geocache is GCAF65 Waterway Wetlands placed by The Lil Otter.
You will find this cache at N44 32.ABC W90 04.DEF
A: The number of letters in the second word in the name.
B & C: The county has a total area of CB0 square miles.
D: The county was founded in 185D.
E: The oldest cache was Hidden : 11/3E/2002
F: The oldest cache in the county is GCAF6F.
SOURCE: Most of the information on this page was obtained from Wikipedia's page about this Wisconsin county.
CHECK SUM: A+B+C=15 D+E+F=13