hour calc

var hour=9;
var minute=0;
var workTime
var negative = false;;

$('.rowGrid-att-green.not-editable-cell').each(function(i,element){
    workTime=$(element).text().split(':');
    hour += parseInt(workTime[0]);
    minute += parseInt(workTime[1]);
})

$('.rowGrid-att-red.not-editable-cell').each(function(i,element){
    workTime=$(element).text().split(':');
    hour -= Math.abs(parseInt(workTime[0]));
    minute -= Math.abs(parseInt(workTime[1]));
})

minute = (hour * 60) + minute;
hour = 0;

hour =  minute/60;
hour = parseInt(hour);
minute = minute%60;

if (minute < 0) {
minute = -minute;
negative = true;
}

if (minute < 10) {
if (negative) {
if (hour == 0) {
console.log('-'+hour+':0'+minute)
} else {
console.log(hour+':0'+minute)
}
} else {
console.log('+'+hour+':0'+minute)
}
} else {
if (negative) {
if (hour == 0) {
console.log('-'+hour+':'+minute)
} else {
console.log(hour+':'+minute)
}
} else {
console.log('+'+hour+':'+minute)
}
}