How you add your cashier experience depends on the resume format you choose. If you worked for less that six months, use a functional resume and format your experience like this:
Cashier, Walmart Atlanta, GA
2019
If you worked for more than six months, use a combination or chronological resume and format your experience like this:
Cashier, Walmart
Atlanta, GA
May 2019 - December 2020
Ran the cash register for 6-hour shifts and processed approximately 20 transactions per hour.
Successfully encouraged 32% of shoppers to add 3-5 items from the checkout aisles, increasing average transaction scores.