I saw a cache like this while on a road trip, so I thought I'd bring the idea back to Ontario.
This multi will require some team work. The posted coords will bring you to the pavilion at beautiful Rockwood Conservation Area. Once you are there, you will need to find the public washrooms. You have to gather some information from both the men's and the lady's rooms. This will be easy for some teams. For others, you may need to ask some new friends... 
In each of the bathrooms, there is an air hand dryer. Find their SERIAL numbers.
Girls Room = ABCD
Boys Room =ILEF
To find the cache use this formula (do not multiply brackets!) N43 36. (A+B) F (B-D) W80 08.(C-B) (E+2) (C-F)
This cache is hidden in Rockwood Conservation Area. Please obey all park rules. There is a trail that leads almost to the cache. No bushwhacking required. I have linked their web page.
