Fatal error: Uncaught ErrorException: A non-numeric value encountered in /home/grademy/public_html/gradeResults.php:180 Stack trace: #0 /home/grademy/public_html/gradeResults.php(180): exceptions_error_handler(2, 'A non-numeric v...', '/home/grademy/p...', 180) #1 {main} thrown in /home/grademy/public_html/gradeResults.php on line 180