U.S. wholesale and import costs rose sharply in the latest government readings, reinforcing concerns that tariffs are beginning to feed through to domestic inflation. The Labor Department said its Producer Price Index jumped 0.9% in July, the biggest one-month gain in more than three years and more than four times the increase economists anticipated. The annual PPI rate accelerated to 3.3%, with services prices up 1.1% and goods prices rising 0.7%. A day later, separate figures from the Bureau of Labor Statistics showed import prices climbing 0.4% in July after a small decline in June, led by a 0.4% advance in consumer goods excluding automobiles and a 2.7% surge in fuel costs. Even after excluding petroleum, import prices increased 0.3%. On a 12-month basis, overall import prices were still down 0.2%, but the monthly rebound indicated that foreign suppliers are not cutting prices to offset higher U.S. duties. Additional data from the Commerce Department pointed to a modest build-up in stockpiles: total business inventories edged up 0.2% in June to $2.66 trillion while sales rose 0.5%, trimming the inventories-to-sales ratio to 1.38 months. Economists said the combination of rising input costs and leaner inventories could put further upward pressure on consumer prices and complicate the Federal Reserve’s debate over a potential rate cut next month.