A cheap and cheerful treasure hunt? American consumers are saying: yes, please. As evidence, Dollar Tree just delivered one of its strongest quarters in years — an emphatic reminder that, in a stressed consumer economy, discount retailers can win big. In the third quarter, Dollar Tree posted 9.4% sales growth to nearly $5 billion, with same-store sales up over 4%, driven almost entirely by a 4.5% jump in average ticket size. That’s a remarkable result in an environment where traffic across much of retail ...