On Thursday, 1 March 2018 16:13:54 UTC, alan_m wrote:
Most seem to do regular shelf stock checks presumably to see if what the
computer says they have hasn't been spirited away.

And also, I think, to make sure the shelf-edge price label is up-to-date and they don't display a false or misleading price indication getting them into hottish water with Trading Standards.

Owain