Doing the math...

I hardly gripe, but this one takes the cake.

Cashier at Aloha gas station in Kapahulu with pretty nails (and only pretty nails): That will be $8.93.
Me: You have this 6-pack advertised for $6.99.
cashier: (notice how I de-capitalized "cashier") Oh, price went up. Now $7.99.
Me: Oh yah, and you charging 8% tax too?
cashier: huh?
Me: Here's $9. Do something useful with the change.