Adding sum of integer fields to another field on a form (Client Side)

[Inactive_User15]

I'm trying to sum multiple integer fields into one on a form. I would like this to be done before the form is saved or submitted AND I need this calculation to trigger based on multiple fields. 

I have about 9 fields that if either one is NOT NULL then I want the calculation to run and populate the sum into a total field. Due to these conditions I'm trying to accomplish this in an UI policy rather than a client script. 

My current code is the following. I've tried using parseInt and adding '+' in front of the integer field. With the code below the field being populate with the total is stating NaN. 

function onCondition() {

var appDev = g_form.getValue('u_app_dev_eta_of_hours');
var applServ = g_form.getValue('u_appl_services_emr');
var sumHours = parseInt(appDev) + parseInt(applServ);
g_form.setValue('u_total_hrs_for_prj_rsrc_work',sumHours);
//g_form.setDisplay('u_total_hrs_for_prj_rsrc_work', +u_app_dev_eta_of_hours + 'u_appl_services_emr');


}

[Inactive_User15]

[Yogi3]

what are the value on u_appl_services_emr and u_app_dev_eta_of_hours. Highly likely they might have letters instead of numbers as text

[Inactive_User15]

They are both integer fields. As I'm testing I'll enter a couple numbers in each which triggers the policy and results in NaN. 

[Yogi3]

try running your code in a function. It might be taking values from other UI policies. Use below code.

function onCondition() {

setHours();

function setHours() {
var appDev1 = g_form.getValue('u_app_dev_eta_of_hours');
var applServ1 = g_form.getValue('u_appl_services_emr');
var sumHours1 = parseInt(appDev1,10) + parseInt(applServ1,10);
g_form.setValue('u_total_hrs_for_prj_rsrc_work',sumHours1);

}

}

[Inactive_User15]

It is an integer