U.S. inflation continued to outpace expectations in February as prices on consumer goods and services inched up .4% from the previous month and 3.2% from the same time last year, according to a federal report released Tuesday. The main culprits behind the uptick, according to Labor Department’s Consumer Price Index Summary for February, are energy prices and the cost of shelter. Changes in the cost of shelter have an outsize impact on the consumer price index as the metric accounts for about one-third of the overall rate.