$(document).ready(function() {
            $("#smstext").on('keyup paste', function(){

            var Characters = $("#smstext").val().replace(/(<([^>]+)>)/ig,"").length; // '$' is missing from the selector

            $("#counter").text(Characters);
            var sms = (Characters/70*1).toFixed(0.99);
            $("#smscount").text(sms);
            $("#itog").text(sms*1.74 + 'руб.');


        });

        function toFixed( num, precision ) {
            return (+(Math.round(+(num + 'e' + precision)) + 'e' + -precision)).toFixed(precision);
        }
    });