Sorry this happened to you, Mixtress82. The cashier was totally out of line. It is easy to say do not let what the cashier said bother you. The fact is it did and it appears the cashier's manager could us some remedial customer relations work.

If this is a chain store, I would consider sending an email to the store's web site detailing what happened and expressing your displeasure at the way the cashier treated you and manager's implication that the cashier would not act that way.

Those with a mental illness are entitled to respect too.

Be well.