58688 MySql Database Cleanup

We need someone very familiar with using MySql / phpMyAdmin and possibly Excel. Our database needs some cleanup including removal of " within cells and the word NULL. I don't see anything else that needs work, but you may. The table was exported into Excel, edited, then imported, which caused these problems. If you would be willing to teach us how to upload properly, or to make mass edits using phpMyAdmin, please include that in your bid.