JSFiddle - React, Tailwind, and code Playground

HTML

<label><input type="radio" name="group1" value="10" id="Add" checked >1</label>
 <label><input type="radio" name="group1" value="20" id="Remove">2</label>
     
 <label><input type="radio" name="group2" value="30" id="Add" checked >3</label>
 <label><input type="radio" name="group2" value="40" id="Remove">4</label>

<input type="button" id="submit" value="test"/>

JavaScript

$('#submit').click(function() {  
    var group1 = $("input:radio[name='group1']:checked").val();
    var group2 = $("input:radio[name='group2']:checked").val();
    var total = parseInt(group1) + parseInt(group2);
    alert(total);
});