Have to say, we have the same annoyance here too. Only 12 units here, and half of us accept notices by email but the printing cost exceeds $1k per year. You could ask them to itemise it in more detail but if they even agreed to do that, they would then charge you for the time of coming up with (making up?) those details … and it might still be difficult to assess.
Probably worth challenging them by asking how the figure was arrived at. At least they will know you’re watching them?