It was an ugly story but fake.
During a photo opportunity at a 1992 grocers’ convention, President George Bush was “amazed” at encountering supermarket scanners for the first time.
Rating:False
“Then the details of the story started to dribble out. Andrew Rosenthal of The New York Times hadn’t even been present at the grocers’ convention. He based his article on a two-paragraph report filed by the lone pool newspaperman allowed to cover the event, Gregg McDonald of the Houston Chronicle, who merely wrote that Bush had a “look of wonder” on his face and didn’t find the event significant enough to mention in his own story. Moreover, Bush had good reason to express wonder: He wasn’t being shown then-standard scanner technology, but a new type of scanner that could weigh groceries and read mangled and torn bar codes.”
https://www.snopes.com/fact-check/bush-scanner-demonstration/
And wasn’t it one that could scan the entire cart at once?