Poison Lady: You Can Always Count On Her And Death

Latest Poison Lady story, I'm of course the unlucky one she comes to . She seems surprised one of our items has tax on it. I try and explain that some of the items do, some don't.
Her: Do you know which ones do?
Me: (blinks) What? You mean in the whole store?
She nods.
Me: Um no.
She looks even more surprised about THIS!: You mean they don't inform you which items have tax on them?
Me (trying not to roll my eyes heavenward for some relief from this woman) No
Her: They don't give you a sheet or anything?
Me: Nope
Her: That's kinda stupid.(finally she leaves)
Next customer in line: Did she just ask you to tell her all the items that had tax on them?
Me(laughing): Yep. Never a dull moment with that one.