Hamburger chain Jack in the Box announced months ago that it was considering strategic options for Qdoba, including a possible sale. The company acquired Qdoba in 2003 when it had only 85 locations in 15 states and $65 million in sales. Jack in the Box grew Qdoba into a national brand with 700 restaurants in 47 states and 2017 fiscal-year sales of more than $820 million. But Qdoba has stumbled in recent quarters.