A semiconductor memory device includes a plurality of functional bit lines, at least one dummy bit line, and a dummy bit line selection unit. Items available for purchase from an electronic marketplace can be selected based on the recipe selection. The controller responds to the mode-selecting switch and controls the electric shears to switch between at least two kinds of operation modes. Next, for each slave node, at least a portion of its respective log entries are replayed until the first replay position is reached. In the preferred embodiment, the plastic braces are created by injecting recyclable resin into a plastic injection mold and onto the paper board carrier.