NaN error in text box after calculation

Hi guys

Below is a bit of code I have done within a repeater, but it returns NaN (Not a number).

Can anybody see what I am doing wrong?

Thanks :slight_smile:

export function button1_click(event, $w) {
wixData.query(‘offers’)
.eq(“avail”, “Y”)
.contains(‘airport’, $w(‘#airportselect’).value)
.contains(‘duration’, “Daybreak”)
.ascending(“date”)

.limit(100) 
.find() 
.then(res => { 

  $w('#repeater1').data = res.items; 
  $w('#repeater1').expand(); 
  $w('#repeater1').show(); 

let adultPrice = res.items.adult;
let childPrice = res.items.child;

let adultCount = $w(‘#adultselect’).value;
let childCount = $w(‘#childselect’).value;

let totalPrice = (‘adultPrice’‘adultCount’) + (‘childPrice’‘childCount’);
$w(‘#totalPrice’).text = “£” + totalPrice.toString();

}); 

}

Get rid of the quotes around

(‘adultPrice’‘adultCount’) + (‘childPrice’‘childCount’);

Putting quotes around a var means you do not test the value, but the string itself (which is not a number)