Wisconsin is made up of 72 counties, this cache is focused on Richland county. Richland County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 18,021. Its county seat is Richland Center. The county was created from the Wisconsin Territory in 1842 and organized in 1850. It is named for the high quality of its soil. Some rural areas in the county have their power provided by the Richland Electric Cooperative. Here are a few stats about Richland County, courtesy of Wikipedia. You can learn more about Richland county at: https://en.wikipedia.org/wiki/Richland_County,_Wisconsin
This county's oldest geocache is GCDA3D Rock Bridge Cache, placed by Hotdogs off trail.
You will find this cache at N44 35.ABC W90 02.DEF
A: The oldest geocache was hidden : 02/2A/2003.
B: The number of Ghost Towns in this county.
C: How many airports in the county?
D, E & F: As of the census of 2000, there were 17,92E people, D,1F8 households.
SOURCE: Most of the information on this page was obtained from Wikipedia's page about this Wisconsin county.
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CHECK SUM: A+B+C=8 D+E+F=12