Vn.DeliveryNote = new Class
({
	Extends: Vn.Report
	
	,subtotalRenderer: function (column, form)
	{
		column.value = this.subtotal (form);
	}

	,subtotal: function (form)
	{
		var price = form.get ('price');
		var discount = form.get ('discount');
	
		if (price && form.get ('fixed'))
			return form.get ('amount') * price * ((100 - discount) / 100);
		else
			return null;
	}
});