Dollar Tree, known for selling $1 items, will start testing higher price points in what it’s calling a “multi-price evolution” driven by a combination of customer demand and inflation. The company, which operates over 15,000 stores across the United States and Canada, said in a Sept. 28 release that customers have welcomed the rollout of Dollar Tree Plus and Combo store formats, which offer items at higher price points. “For decades, our customers have enjoyed the ‘thrill-of-the-hunt’ for value at one dollar—and we remain committed to that core proposition—but many are telling us that they also want a broader product assortment when they come to shop,” the company’s chief executive, Michael Witynski, said in a statement. While the company’s press release made no mention of inflation, Witynski told The Wall Street Journal in an interview that higher costs— including materials, wages, shipping—were also a factor. Investors welcomed the announcement, with …