"Employers are looking to hire cashiers with great customer service skills and experience handling cash. In preparation for an interview, come ready to answer role-play questions that will assess your ability to appease difficult customers under stressful circumstances. Make sure to showcase a positive and easy-to-work-with attitude that will convince your interviewer you're right for the job."
"A customer is buying cans of vegetables that are ringing up at $0.75, but she insists they were on sale for $0.35. What would you do?"
They want you to just take the customers word and change the price without question for things like this, so long as it's within $3. If it's more than that you should call someone to check the price on the item, if it's less, they don't care.
Ask for help to get a price check and tell the customer it will be quick.
I will call the manager and they can help me to do something about like changing price.