Adobe PDF JavaScript to calculate the radio button Choices of a form

I have searched the posts and tried the code, but I am missing something.

My Grouped Radio Buttons have JavaScript on Mouse Down

    this.getField("Yes").value = "1"

    this.getField("No").value = "2"

    this.getField("NA").value = "3"

My Text Fields has JavaScript for Custom calculation script. The Yes and 1 are changed to No and 2, and NA and 3 for their respective text field.

    (function () {

    var i, val, sum = 0;

    for (var i = 1; i <= 48; i ++) {

    val = getField("Group" + i).getField("Yes").value; 

    if (val == "1") {

    sum += +val;

    }

    }

    event.value = sum;

    })();