This story was originally published on Retail Dive. To receive daily news and insights, subscribe to our free daily Retail Dive newsletter. Dive Brief: Dollar Tree’s fourth quarter net sales increased 9% year over year to $5.45 billion, per a Monday release. The retailer’s same-store net sales increased 5% due to a 6.3% jump in average ticket that was partly offset by a traffic decline of 1.2%. The discount chain’s operating income grew 30.2%, and gross profit increased 13.3%. Meanwhile, Dollar Tree s ...