Wendy’s is taking a bite out of Burger King in the fast food business. Dave Thomas’s restaurants became the No. 2-selling hamburger chain in the country last year, industry research firm Technomic said Monday, pushing Burger King back to the No. 3 spot. Burger King had been No. 2 spot since at least 1972, the earliest year for which Technomic has data. Wendy’s U.S. sales totaled $8.5 billion last year, edging out Burger King and its $8.4 billion. Wendy’s has roughly 5,900 locations in the U.S. compared with Burger King’s 7,200. McDonald’s, meanwhile, dwarfed both with over $34 billion in sales last year at its 14,098 U.S. locations. It’s the largest restaurant chain in the country, followed by Subway, Starbucks, Wendy’s and Burger King.