Update website to current version of Wordpress

Our current, 5-page website is running on Wordpress 3.0.x and needs to be updated to the current version of Wordpress. We are using WHM/cPanel. Looking for a low-cost solution. To separate the bots from the people who actually read this description to derive their quote, please include the phrase "Tonic Website" in your response.

Once completed, we will post a separate job to redesign and build a new version of the website. Thanks!