I found the Kirkland Signature chicken salad in Costco's prepared foods section. It was priced at $6 a pound, making it the least-expensive option I tried on a per-pound basis.

As a mom of 4 who's been shopping at Costco for 10 years, the $5 rotisserie chicken is my go-to. I shred it as a base for yummy salads, use it to make crispy tostadas, and turn it into chili.