Higher costs spark a disappointing earnings result.United Parcel Service (UPS -13.18%) saw a return to volume growth in the quarter, but higher-than-expected expenses weighed on results.Shares of UPS traded down 12% as of 10 a.m. ET after the company reported a top- and bottom-line miss.Volumes, and costs, are heading higherIt has been a tough 18 months for transportation companies. A surge in shipping after the height of the pandemic gave way to uncertainty about the health of the economy, causing large co ...