Rising commodity costs are threatening to destroy any kind of optimism operators held that they were climbing out of the nation’s economic woes. The costs present a consistent challenge to Togo’s, for instance, as it plans on opening 50 units in 2012 and develop the franchised concept beyond its 244 stores. “The rising commodity prices can negatively impact everything we’re trying to do as a brand,” Togo’s vice president of branding and marketing Renae Scott says....