Sentence:  Instead of trying to make her crowds quit throwing things, Audra had simply distributed items it would be okay for them to throw: day-old corn tortillas. A big bag of <WSD>day-olds</WSD> cost only a couple of bucks ... 
Meaning of the word marked with <WSD> tags:  A perishable product that is a day old, and may be sold more cheaply as a result.