Abdul007Malik

function calculate(args) {
    let time = null, dump, minutes;
    dump = args.split(',')
    minutes = dump.reduce((total, timeDiff) => {
        time = timeDiff.split('-')
        total += moment(time[1], "hh:mm").diff(moment(time[0], "hh:mm"), 'minutes')
        return total;
    }, 0);

    return { minutes, hhmm: moment.utc(minutes * 60 * 1000).format('hh:mm') }