Walmart offers the Coleman Green Valley Cool Weather Sleeping Bag for $29.99. Opt for in-store pickup to avoid the $5.99 shipping fee. That's the lowest price we could find by $5. It's suitable for temperatures between 30⁰ F and 50⁰ F and features a no-snag zipper and Quick Cord fastening system.
With these companies, it might be easier than you think to negotiate your monthly bill down.