With many managers, that response may have cost you your job.
it did cost me a job...had a boss want me to do something unethical and I refused laughed in his face. he fired me I immediately walked over to another store told the manager what happened and started to work there...If you have a low paying job that pays close to minimum wage(most cashiers are paid low wages.) you should not allow them to crap on you because there is always another low paying job....I admit it becomes more difficult if instead of a low paying cashiers job it is anything that pays good with bennies.,