JW is a 23 yom that presents to the emergency room with a perforated stomach after trying to eat a 5-pound pierogi. He has complaints of severe abdominal pain, fever, and tachycardia. He is diagnosed with a perforated stomach and a mild to moderate severity community acquired intra-abdominal infection. He is being prepped to go for surgical repair, and the surgeon wants an antibiotic recommendation. He has an unknown allergy to penicillin.  Which one of the following empiric antibiotic regimens would be most appropriate?