PO Puzzle Series – Chanhassen (Mystery)
Seems like everyone is working on either the Mystery Cache Challenge, the Multi Cache Challenge, or both. So, I decided to do a twofer special here. 
This cache is a two-stage Mystery cache. Stage 1 is a virtual stage. There is also a companion Multi cache that uses the same virtual grid in this building.
You must first visit stage 1 to get the required information to find stage 2. The stage 1 location is open 24/7. This virtual stage is authorized by the Chanhassen Postmaster. Please use stealth and be respectful of others using this facility.
PLEASE note the Final Cache is NOT in this building nor anywhere on this property
To determine the coordinates for the final stage use the GRID, ROW, COLUMN formula below. Inside there are banks of boxes lining the walls separated by black trim like a grid pattern. The grid is upper left corner, rows are down, columns are over, this gives you a number that you use, and then you must do some math.
N 44 52. (G61:R4:C3) + 16
W 093 32. (G121:R4:C4) + 9