As of Tuesday, over 40 Safeway stores and a distribution center in Colorado had workers on strike. United Food and Commercial Workers 7, the union representing those workers, is demanding better pay and working conditions for those workers.

Workers at dozens of Safeway and Albertsons grocery stores in the region have ended their strike after the union representing them announced a breakthrough in contract negotiations.

After 20 days on the picket lines, Pueblo and Pueblo West Safeway workers are back to work. Here's what to know about the tentative agreement.