**CACHE IS NOT AT POSTED COORDINATES** but that is a good place to park!
Complete the Ghost Stories - Volume 1 Adventure Lab to get the missing numbers.
Here's the link to the Lab: https://adventurelab.page.link/fxan
Bonus Cache is located at:
N38 45.ABC W111 59.DE6
Cache is not located too close to the gravesites, so no need to search headstones or grave decorations. You will need to access the cache from inside the cemetery (don't go on private property outside the cemetery, please). And have fun!