Another round of price increases on household products like Gillette razors, Dawn dish soap and Swiffer dusters bolstered Procter & Gamble’s bottom line last quarter, the company said on Friday, a sign that stubborn inflation may linger as companies defend their profit margins.Procter & Gamble, a consumer goods bellwether, said its profit grew in the first three months of the year after it raised prices 10 percent across its brands. That rise was the company’s second consecutive quarter of double-digit increases. Its profit margin expanded in the quarter, with price increases more than offsetting the rise in what it paid for raw materials.Revenue rose 4 percent last quarter from a year earlier, even as sales volume …
