Repairs and Maintenance of Common Property

Hi,I am a newbie at strata and have been reading all the posts.

I am certain if this is the correct place to post this.

I have purchased an unit wherein strata undertook works to the common property items (i.e windows, sliding door locks, new lighting in common area etc).

I receieved a copy of the contractors bill and have noted that they lumped all works together in one fee.

Should not the new windows, locks and lighting be seperately costed so that these items can be depreciated or does this not occur in strata?

Your responses are appreciated.