For the fourth quarter ended Dec. 31, Restaurant Brands International Inc. reported U.S. same-store sales declines of 6.4% at Popeyes and 2.9% at Burger King. At Tim Horton’s, where the company includes both U.S. and Canada restaurants, same-store sales fell 11.9%. At Popeyes, the popular chicken sandwich has boosted average unit volumes more than $400,000 since fall of 2019, when the menu item was added permanently.