sumCardsWithMinutesSeconds

gistfile1.txt

var moved = new Notification(notification).movedCard();
var minutesum = 0;
var secondsum = 0;
var curlist = moved.currentList();

curlist.cards().each(function(card)
{
  var timesplit = card.customFieldValue("Time").split(":");
  
  if(timesplit.length > 1)
  {
    minutesum += parseInt(timesplit[0]);
    secondsum += parseInt(timesplit[1]);
  }
});

minutesum += Math.floor(secondsum/60);
secondsum = secondsum % 60;

curlist.cards().first().setName(minutesum+":"+secondsum);