“complex’ correspondence charge by Strata Manager

IN our strata agreement, in Schedule B it notes that the strata manager can charge $198 per hour for ‘time to prepare complicated/non-routine correspondence. I have e-mailed him with some questions prior to submitting our special by-law for renovations (which has been approved) and in his costs he is charging 3 hours (that is $594 in total). Is this possible. They refuse to give details as to what they have done. They have my deposit and I am worried that they will just take it out of the deposit.