Boise, Idaho — Boise, Idaho-based grocery chain Albertsons Cos. has agreed to acquire Rite Aid Corp., one of the nation’s largest drugstore chains, for an undisclosed sum. The integrated company will operate about 4,900 locations, 4,350 pharmacy counters, and 320 clinics across 38 states and Washington, D.C., serving more than 40 million customers per week.