translate English to French: The CPI won't tell you the price of a toothbrush; however, it can tell you how much more a variety of articles would cost today relative to the cost in years gone by.
L'indice des prix a. la consommation (IPC) est un autre exemple d'indice; dans ce cas, Ie prix d'un certain nombre d'articles precis est veritie de fagon reguliere.