消費者物價指數 - 經濟

Suppose the price of a quart of milk rises from $1 to $1.25


and the price of a T-shirt rises from $8 to $10.


If the CPI rises from 150 to 175 people will likely buy



答案是: less milk and fewer T-shirts



我是先算牛奶跟t-shirt的CPI 都是125



但是我要怎麼去判斷那兩樣物品該 買多還是 買少... ...



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