Florida --Police in Florida are looking for a group of people who used a Walmart self-checkout as their own personal slot machine.Last week, at least eight people who appeared to know each other allegedly took advantage of an employee's error to take more than $1,100 in $20 bills from the store.At around 12:34 a.m. Saturday, the group went to check out at the Walmart in Winter Haven.Police said a bald man with a large tattoo on his right shoulder scanned and paid cash for two items, but soon found himself better off when the machine spit out a $20 bill instead of the $5 and change he was owed back.