JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app>
  <div ng-controller="Ctrl">
    <ul>
        <li ng-repeat="item in Data">
            <input ng-model="item.Value" />
            
            </li>
        </ul>
      Total: {{sum(Data)}}
  </div>
</div>

JavaScript

function Ctrl($scope) {
  $scope.Data = [
    {
        Value: 1
    },
    {
        Value: 2
    }];
    $scope.sum = function(list) {
      var total=0;
      angular.forEach(list , function(item){
        total+= parseInt(item.Value);
      });
      return total;
     }
}