time

var duration = 0;
var result = '';

$('#tableData tr').slice(10, 13).find(':contains("00:")').each((index, element) => {
  var time = $(element).text()
  var minutes = time.split(':')[1]
  var seconds = time.split(':')[2]
  duration = duration + parseInt(minutes) * 60 + parseInt(seconds)
});

function toHHMMSS(seconds) {
    var sec_num = seconds // don't forget the second param
    var hours   = Math.floor(sec_num / 3600);
    var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
    var seconds = sec_num - (hours * 3600) - (minutes * 60);

    if (hours   < 10) {hours   = "0"+hours;}
    if (minutes < 10) {minutes = "0"+minutes;}
    if (seconds < 10) {seconds = "0"+seconds;}
    return hours+':'+minutes+':'+seconds;
}

result = toHHMMSS(duration);