This variety of k-cup is $28.99 for 100 k-cups. If you do the math, that's $0.29 per k-cup.
Amazon is a bit wordier with how they named this product. They call it "Amazon Brand - 100 Ct. Solimo Medium Roast Coffee Pods, Kona Blend, Compatible with Keurig 2.0 K-Cup Brewers".
Some additional details about this product:
Need to know more? You can read more about this product on Amazon.
Oh, and here's a bunch of pictures if you've never seen k-cup pods before: