eli5 : How do the new grocery scanners work where you just put stuff in a box do they work similar to book scanners

Question

Link to what I mean

https://youtu.be/Wz2SFCaxtcM

In: Technology

Answer 1

We could have tech where you roll your shopping trolley through a scanner and it determines the price you owe and everything you purchased…..but noooo execs and managers have resisted it for the last 15 years.