Economists use computers and complicated formulas to plot changes in the cost of living, but the U.S. housewife has a simpler way. Says Mrs. Donald R. Petit, a Miami mother of three: "I spend $25 to $30 a week for groceries, and it comes out to $5 a bag. Last week, for the first time, they put $25 worth of groceries into only four bags."
Not to be outdone, the computers last week verified what Mrs. Petit and other housewives were noticing at the check-out counter. The Labor Department reported that the consumer price index in June scored the biggest...
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