Eastern Mountain Sports, the outdoor clothing dealer, says sales increased by one-third this month compared with the year before at its store in SoHo. “A lot of that is Europeans coming over,” said Will Manzer, the company’s president. With oil selling at approximately $100 a barrel, the Taste of Texas Steakhouse in Houston is reveling in days of plenty. Even areas suffering the downturn can bank on considerable help on the way, economists say, as the impact of lowered interest rates kicks in later this year, encouraging businesses to expand.