WASHINGTON, Aug 13 (Reuters) - U.S. producer prices were unchanged in July as goods prices declined, though a rise in the cost of services suggested inflation could remain elevated. The flat reading in the Producer Price Index for final demand last month followed a revised 0.

Wholesale prices were unchanged last month as energy prices edged down, the Labor Department said.

The small rebound in the monthly Consumer Price Index reported by the Labor Department on Wednesday, which was in line with economists' expectations, also reflected marginal gains in the prices of ‌fo...