A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. Each deposited article is then pushed across the changing support by a conveying-away gripper and, while being pushed, is grasped by closing the conveying-away gripper and is conveyed away held gripped on a second edge. A 4-2 carry block generates a 4-2 carry output from the second to fourth logical inputs. The offer is sent to a server which transmits an answer to the offer. Upstanding front and rear panels are connected to the front side and rear side of the base.