Me (with cart full as above) - approaches register
Cashier - you know tomorrow is half off day right?
Me - yup, that's why I'm here today
Her - but there's no discount today
Me - right.
Her - (confused face)
Old lady behind me - son, tomorrow those would be half off she said
Me - right, that's why I came today.
Her - shakes head
As I'm walking out I hear them say "that boy ain't too smart, is he now"
Pretty clever if you ask me.