i used double quotes in my example and it looks like you need to use single quotes. Update line 112 to:
if (true && (("UPS"=="UPS")&&(isset($_SESSION["eCart1_UPS_Quote"]))&&(floatval($_SESSION["eCart1_UPS_Quote"]) > 0) && (( (isset($_SESSION['PromoCodeValue'])?$_SESSION['PromoCodeValue']:'0') == 0 )))) {