According to Conklin & deDecker, Fall 2006 edition, using $2.75/Gallon fuel cost and $70/hour maintenance labor, the 212 costs $902.69/hour (USD) to operate.
Breaking that out ...
Fuel $272.25
Lubricants $8.17
Maintenance Labor $144.90
Parts Airframe / Engine / Avionics $135.83
Engine Restoration $204.97
Dynamic Components / Life Limited Parts $136.57
Tompkins