Help with Tallying Up Info from Checkboxes

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Hi

This does the trick (did for 3, complete to as much as needed).

$w.onReady(function () {
    $w("#checkbox1").value = "1";
    $w("#checkbox2").value = "2";
    $w("#checkbox5").value = "3";
   $w("#checkbox1").onChange( (event, $w) => {
        manageSum();
    } );
    $w("#checkbox2").onChange( (event, $w) => {
        manageSum();
    } );
    $w("#checkbox5").onChange( (event, $w) => {
        manageSum();
    } ); 
    manageSum();
});
 
function manageSum(){
 var sum = 0;
 if ($w("#checkbox1").checked) sum += Number($w("#checkbox1").value); 
 if ($w("#checkbox2").checked) sum += Number($w("#checkbox2").value); 
 if ($w("#checkbox5").checked) sum += Number($w("#checkbox5").value); 
 $w("#text18").text = ""+sum;
}