Why are some food prices up and others down? Here are the stories of 5 items

Here's what's behind the fluctuating costs of everyday grocery items such as ground beef, eggs and chocolate chip cookies.

<img src='undefined' alt='undefined'/><p>Here's what's behind the fluctuating costs of everyday grocery items such as ground beef, eggs and chocolate chip cookies.</p><img src='https://media.npr.org/include/images/tracking/npr-rss-pixel.png?story=nx-s1-5989636' />