Ah, you need the Flat Chat CWOT (Complete Waste Of Time) calculator.
What you do is add up the hours that you and any other member of the committee spends on this, including time spent lying awake, mulling and fretting, and multiply it by your average hourly rate of pay.
When that sum reaches the designated figure – in this case $300 – you cut your losses and send the strata manager (or whoever) a polite email saying something like “your reluctance to pay is noted and will be a factor when we are considering your next contract”.
Easy-peasy.