Only unit hydro is metered.
Your fan coil is still shared, which means AC and heating. It takes energy to provide central air to unit, that is not metered.
Take out your last AGM package, add up corp's hydro, water and gas expenses then divide by # of units, you get a true picture.
So the $20 hydro charge out of the $75 is mainly for cooling extra body giving off heat in summer i.e. less than 6 months.