var calculator = {
	calculate : function ()
	{
		var quantity = parseInt($('#calculator-quantity').attr('value'));
		if (isNaN(quantity) || quantity < 0) {
			quantity = 0;
			$('#calculator-quantity').attr('value', quantity);
		}
		if (quantity > 1000) {
			quantity = 1000;
			$('#calculator-quantity').attr('value', quantity);
		}
		
		var price = 0;
		if (quantity < 0) {
			price = 0;
					} else if (quantity < 10) {
				price = quantity * 184.95;
						} else if (quantity < 50) {
				price = quantity * 173.95;
						} else if (quantity < 100) {
				price = quantity * 163.95;
						} else if (quantity < 1001) {
				price = quantity * 155.95;
					} else {
			price = 0;
		}
		
		price = (Math.round(price*100))/100;
		price = (price == Math.floor(price)) ? price + '.00' : ((price*10 == Math.floor(price*10)) ? price + '0' : price);
		price = price.toString().replace(/([0-9]+)([0-9]{3}\.[0-9]{2})/, "$1,$2");
		
		$('#calculator-price').empty();
		$('#calculator-price').append('$' + price);
	}
}