LYNN-A 20-year-old man was stabbed Monday at the Lynnway Auto Auction after he and the suspect got into an argument over a Wendy’s fast food purchase, police said.Brandon White, 24, of 65 Philips Ave., Lynn, was arrested and charged with assault and battery with a dangerous weapon (knife) shortly after the 2:30 p.m. attack.Police found the victim at the Lynn Community Health Center on Union Street, where he told officers what happened.”While working at the Auto Auction, he claimed to have become involved in an altercation with (White). The dispute stemmed from an argument over the purchase of lunch at Wendy’s,” police spokesperson Lt. Dave Brown said.During the argument, White pulled an object from his pocket and struck the victim in the back, causing a puncture wound.The victim’s injuries are not considered life-threatening.