该书是《金家孩子学理财》系列丛书（共二十册）中的第十三册。本书既可以作为本系列的一部分来阅读，又可以独立成书。在本书里，妈妈在带着孩子们到杂货店买东西后，抱怨一直升高的物价。他跟家人们解释了通货膨胀和通货紧缩的概念。
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