Umm... An urban micro multi series. Some folks were keen to see more multis on their maps. These may not be fancy, but they should scratch that itch.
At the posted coordinates is a post. On the post is a metal tag. On the tag is a MFG DATE, call that value AB-C. To find the next waypoint, subtract Ax10 from the posted north coordinates and subtract A from the posted west coordinates.
At this waypoint, you can find a large red sticker with a phone number at the bottom. Call that number (not literally!) 1-800-JKL-MNOP. To find the next waypoint, subtract AK from the north portion and subtract the total of A+J+P from the west portion of the last solved coordinates. Is it just me, or does it always seem to be subtraction?
At this waypoint, you'll see a fairly prominent 4 digit number. Call that number WXYZ. For the cache coordinates, subtract (surprise, surprise) the total of C+Z-L-N-Y from the north and X from the west of your current coordinates.
Please ensure that the container lids are tightly closed and upright to help keep water out.