This seems to be wrong;
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I think either someone doesn't know what that phrase means or "are" should be "aren't".
"A dime a dozen" means something is cheap, easy to come by.
also
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you wouldn't ask the electric company to do that, you'd just shut it off at the breakers in the electric supply cabinet, the maintenance guy should be able to handle that or at worst you'd just shut the individual breakers in the fuse boxes for each room.
I'm not trying to nit-pick, just feed back since I actually like your stories and these are easy fixes.