After setting up a javascript calculation with 2 fields with decimals, I get a total with a long number after the decimal place.  I am looking to shorten it to 2 numbers after the decimal place.  Upon trying to add .tofixed(2) ended up breaking the calculation.  Any suggestion is appreciated, thanks.

$(document).ready(function () {
    $('.cf-table-block').on('blur', 'input', sumtotal);
    function sumtotal() {
      	$('.total input').attr('readonly', false);
        var hours = 0;
      	var rate = 0;
      	var Mat = 0;
      	var ODC = 0;
      	var LC = 0;
      	var AO = 0;
      	var SGA = 0;
      	var Profit = 0;	
        var total = 0;
        var subtotal = 0;
      	      
        $('.cf-table-block tbody tr').each(function () {
            hour =  parseNumber($(this).find('.hours input').val()); 
            rate = parseNumber($(this).find('.rate input').val());
          	Mat = parseNumber($(this).find('.Mat input').val());
          	ODC = parseNumber($(this).find('.ODC input').val());
          	LC = parseNumber($(this).find('.LC input').val());
          	AO = parseNumber($(this).find('.AO input').val());
          	SGA = parseNumber($(this).find('.SGA input').val());
          	Profit = parseNumber($(this).find('.Profit input').val());
          	                     
            subtotal = (hour * rate)+Mat+ODC+LC+AO+SGA+Profit;
          	
            $(this).find('.total input').val(subtotal);
            total += subtotal;
        });
        //$('.Grandtotal input').val(total);
    }
    function parseNumber(n) {
        var f = parseFloat(n); //Convert to float number.
        return isNaN(f) ? 0 : f; //treat invalid input as 0;
    }
});