var _getTicketQuantity = function(attendeeItems, sku){
		var ticketQuantity = 0;
		var attendeesBySku = attendeeItems.filter(function(attendee) {
			return attendee.sku === sku;
		});
		return attendeesBySku.reduce(function (accumulator, currentValue) {
			return accumulator + currentValue.quantity;
		}, ticketQuantity);
	};
	var _attendeeClassIdMap = function(attendees, ticketClassId) {
		return attendees.map(function(mapObj) {
			return mapObj[ticketClassId];
		})
	};
	var _createGAItemGroup = function(attendees, ticketClassId) {
		var attendeeClassIdMap = _attendeeClassIdMap(attendees, ticketClassId);
		var filteredTicketGroups = attendees.filter(function(attendee, position, arr){
			// Filter out the object if there is more than 1 attendee row with the same ticketClassId
			return attendeeClassIdMap.indexOf(attendee[ticketClassId]) === position;
		});
		return filteredTicketGroups.map(function(filteredTickets){
			// set the correct ticket quantity associated with each ticketClass
			return {
				id: filteredTickets.id,
				sku: filteredTickets.sku,
				name: filteredTickets.name,
				category: filteredTickets.category,
				price: filteredTickets.price,
				currency: filteredTickets.currency,
				quantity: _getTicketQuantity(attendees, filteredTickets.sku).toString()
			};
		});
	};
	var gaEventId = '1480658020999';
	var gaEventName = 'CPD Certificate in Quality Management System Lead Implementation \u002D ISO 9000';
	var gaPagename = gaEventName;