{HEAD ~ The system} 2, wherein {TAIL ~ the monitoring system} is further configured to transmit, to the wheel unit of the shopping cart that is approaching the exit, information that controls whether the wheel unit performs an action that inhibits shopping cart motion 
{ HEAD ~ The system } 2 , wherein { TAIL ~ the monitoring system } is further configured to transmit , to the wheel unit of the shopping cart that is approaching the exit , information that controls whether the wheel unit performs an action that inhibits shopping cart motion
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH