Dollar Tree has seen an increase in foot traffic to its stores, but those consumers aren’t buying as much.The retailer, which also is the parent company of Family Dollar, released its first-quarter earnings report Wednesday (June 5) for the quarter ending May 4.Dollar Tree Chairman and Chief Executive Officer Rick Dreiling credited the decline to lower discretionary spending as consumers — many living paycheck to paycheck — cut back. The retailer saw an average decline of 1.1% in ticket size across both its ...