public List <ScreenData> Get()
        {
            List <ScreenData> screenDatas = new List <ScreenData>();
            var monitorDatas = _monitorDataRepository.GetAll();
            var queueGroups  = _queueGroupRepository.GetAll();

            foreach (var monitorData in monitorDatas)
            {
                var currentQueueGroup = queueGroups.SingleOrDefault(x => x.ID == monitorData.QueueGroupID);
                screenDatas.Add(new ScreenData
                {
                    Handled             = monitorData.Handled,
                    Offered             = monitorData.Offered,
                    QueueGroupName      = currentQueueGroup.Name,
                    AverageHandlingTime = OperationHelper.CalculateAverageHandlingTime(monitorData),
                    AverageTalkTime     = OperationHelper.CalculateAverageTalkTime(monitorData),
                    ServiceLevel        = OperationHelper.CalculateServiceLevel(monitorData),
                    ColumnColour        = OperationHelper.DecideColumnColour(currentQueueGroup, monitorData)
                });
            }

            return(screenDatas);
        }