WASHINGTON (AP) — An inflation gauge closely tracked by the Federal Reserve remained low last month, adding to signs of cooling price increases and raising the likelihood that the Fed will leave interest rates unchanged when it next meets in late September. Thursday's report from the Commerce Department showed that prices rose just 0.2% from June to July, the third straight modest increase. Compared with a year earlier, prices rose 3.3% in July, up from a 3% annual increase in June.