Calculate Total hours for an invoice period

gistfile1.txt

        hourSetting.getTime()
            .then(function (res) {
                if (res.status === 200) {
                    $scope.time = res.data;
                    $scope.shortDate = $filter('orderBy')(res.data, 'timestamp');
                    $scope.min = $scope.shortDate[0].timestamp;
                    $scope.max = $scope.shortDate[$scope.shortDate.length - 1].timestamp;
                    console.log($scope.max);
                    hourSetting.get_cusSetting()
                        .then(function (res) {
                            $scope.invoiceDate = res.data.invoice_day_of_month;
                        });
                }
            })
            .catch(function () {
                $scope.time = [];
            });
            
            
  outPut: invoice period = Aug 1 2018 to sept 1 2018 , Total hours = xx hour xx min
  total hour = total (logged_time)

gistfile2.txt

console.log($scope.shortDate);
(10) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]
0: {id: 22, timestamp: "2018-03-03T18:30:00Z", transaction_id: 7893, user_id: 4, logged_time: 122, …}
1: {id: 1, timestamp: "2018-06-20T11:15:45Z", transaction_id: 7872, user_id: 4, logged_time: 60, …}
2: {id: 21, timestamp: "2018-07-04T18:30:00Z", transaction_id: 7892, user_id: 35, logged_time: 60, …}
3: {id: 23, timestamp: "2018-07-04T18:30:00Z", transaction_id: 7894, user_id: 35, logged_time: 60, …}
4: {id: 35, timestamp: "2018-07-12T08:07:00Z", transaction_id: 7906, user_id: 4, logged_time: 111, …}
5: {id: 46, timestamp: "2018-07-17T00:00:00Z", transaction_id: 7920, user_id: 4, logged_time: 122, …}
6: {id: 55, timestamp: "2018-07-17T00:00:00Z", transaction_id: 7930, user_id: 4, logged_time: 1, …}
7: {id: 68, timestamp: "2018-07-25T00:00:00Z", transaction_id: 7956, user_id: 4, logged_time: 122, …}
8: {id: 65, timestamp: "2018-07-25T18:30:00Z", transaction_id: 7952, user_id: 4, logged_time: 23, …}
9: {id: 71, timestamp: "2018-09-04T00:00:00Z", transaction_id: 8024, user_id: 1, logged_time: 138, …}

console.log($scope.max);
2018-09-04T00:00:00Z

console.log($scope.invoiceDate);
19