Talk a walk along the American River foreshore. At the listed coordinates you will find a green wooden sign. Complete the following maths and you will learn the location of the geocache. Enjoy your stroll.
A: Number of letters in the first word on the sign?
B: Number of letters in the second word on the sign?
C: Number of letters in the third word on the sign?
D: Number of letters in the fourth word on the sign?
S35° 46.BCA E137° 47.DAB
Checksums: 13 and 8