You may choose any item from a particular floor, or may choose to go up to the next floor, but you CANNOT go back down except to exit the building.
你可以在任何一层选择任意商品，你也可以选择登上下一层，但是，你不能往回走，除非你要离开商店。
Start with the item farthest back and work up to the present.
启动该项目，最远回来工作，目前为止。
Input date agree with item code back-check whether in price stick up for among stock.
输入日期键入单品号检查是否在价格维护期间进货。
Input date agree with item code back-check whether in price stick up for among stock.
输入日期键入单品号检查是否在价格维护期间进货。
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