WALMART shoppers could soon face longer waits at checkout as a tough new rule threatens to overhaul the self-checkout experience.
Retailers now risk a $2,500 fine every time they break new self-service rules and the penalties can stack up fast.
In Long Beach, California, the city has capped how many self-checkout terminals one employee can monitor at a time.
Workers can now oversee a maximum of two machines, and stores must keep at least one staffed register open at all times…