jquery seat chart problema nel ricalcolo del totale

[quotidiano]

Questo � un adattamento del codice Jquery Seat Chart un plugin presente su: https://github.com/mateuszmarkowski/jQuery-Seat-Charts

var price = 0; //pricevar $cart = $('#selected-seats'); //Sitting Area
var $counter = $('#counter'); //Votes
var $total = $('#total'); //Total money


var sc = $('#seat-map').seatCharts({
	map: [  //Seating chart
		'aaaaaaaaaa',
    'aaaaaaa__a',
    'aaaaaaaaaa',
    'aaaaaaaaaa',
		'aaaaaaabbb'
	],
	naming : {
		top : true,
		rows: ['A','B','C','D','E'],
		getLabel : function (character, row, column) {
			return column;
		}
	},
	seats:{
		a:{
			price: 99.9
		},
		b:{
			price: 200
		}
	},
	legend : { //Definition legend
		node : $('#legend'),
		items : [
			[ 'a', 'available',   'Option' ],
			[ 'a', 'unavailable', 'Sold']
		]
	},
	click: function () { //Click event
		if (this.status() == 'available') { //optional seat
			var maxSeats = 3;
			var ms = sc.find('selected').length;
			//alert(ms);
			if (ms < maxSeats) {
				
				price = this.settings.data.price;
				
				/*
					$('<option selected>R'+(this.settings.row+1)+' S'+this.settings.label+'</option>')
					.attr('id', 'cart-item-'+this.settings.id)
					.attr('value', (this.settings.row+1)+'_'+this.settings.label)
					.data('seatId', this.settings.id)
					.appendTo($cart);
				*/
					
					$('<option selected>R'+(this.settings.row+1)+' S'+this.settings.label+'</option>')
					.attr('id', 'cart-item-'+this.settings.id)
					.attr('value', this.settings.id)
					.attr('alt', price)
					.data('seatId', this.settings.id)
					.appendTo($cart);


				$counter.text(sc.find('selected').length+1);
				$counter.attr('value', sc.find('selected').length+1);


				$total.text(recalculateTotal(sc));
				$total.attr('value', recalculateTotal(sc));


				return 'selected';
			}
				alert('You can only choose '+ maxSeats + ' seats.');
				return 'available';


		} else if (this.status() == 'selected') { //Checked


				//Update Number
				$counter.text(sc.find('selected').length-1);
				$counter.attr('value', sc.find('selected').length-1);
				//update totalnum
				$total.text(recalculateTotal(sc));
				$total.attr('value', recalculateTotal(sc));


				//Delete reservation
				$('#cart-item-'+this.settings.id).remove();
				//optional
				return 'available';


		} else if (this.status() == 'unavailable') { //sold
			return 'unavailable';


		} else {
			return this.style();
		}
	}
});
function number_format (number, decimals, decPoint, thousandsSep) { // eslint-disable-line camelcase
  
  number = (number + '').replace(/[^0-9+\-Ee.]/g, '')
  var n = !isFinite(+number) ? 0 : +number
  var prec = !isFinite(+decimals) ? 0 : Math.abs(decimals)
  var sep = (typeof thousandsSep === 'undefined') ? ',' : thousandsSep
  var dec = (typeof decPoint === 'undefined') ? '.' : decPoint
  var s = ''
  var toFixedFix = function (n, prec) {
    var k = Math.pow(10, prec)
    return '' + (Math.round(n * k) / k)
      .toFixed(prec)
  }
  // @todo: for IE parseFloat(0.55).toFixed(0) = 0;
  s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.')
  if (s[0].length > 3) {
    s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep)
  }
  if ((s[1] || '').length < prec) {
    s[1] = s[1] || ''
    s[1] += new Array(prec - s[1].length + 1).join('0')
  }
  return s.join(dec)
}


// Add total money
function recalculateTotal(sc) {
	var total = 0;
	$('#selected-seats').find('option:selected').each(function () {
		total += Number($(this).attr('alt'));
	});


	return number_format(total,2,'.','');
}

la parte dove ho problemi � questa :

 	$total.text(recalculateTotal(sc));
	$total.attr('value', recalculateTotal(sc));:

quando riclicco per deselezionare il posto non aggiorna il totale al primo riclick, ma solo nei successivi riclick; deselezionando tutti i posti il totale presenta il valore del primo click

Ho provato con .price-1 ma non funziona

Qualcuno pu� suggerire una soluzione?