var app = angular.module('MainApp', []);

app.controller('shopController', function($scope) {
  $scope.invoice = {
      items: [{
        qty: 10,
        description: 'item',
        cost: 9.95
      }]
    };
    $scope.addItem = function() {
      $scope.invoice.items.push({
        qty: 1,
        description: '',
        cost: 0
      });
    };
    $scope.deleteItem = function(index) {
      $scope.invoice.items.splice(index, 1);
    };
    $scope.subTotal = function(item) {
      return item.qty * item.cost;
    };
    $scope.total = function() {
      var total = 0;
      angular.forEach($scope.invoice.items, function(item) {
        total += item.qty * item.cost;
      });

      return total;
    }
});
<!DOCTYPE html>
<html>

<head>
<script type='text/javascript' src='//cdnjs.cloudflare.com/ajax/libs/angular.js/1.0.3/angular.min.js'></script>  <script src="app.js"></script>
</head>
  <body ng-app='MainApp'>

        <h2>Shopping Cart Example</h2>

        <div ng-controller='shopController'>
            <table class=".table-striped">
                <tr>
                    <th>Description</th>
                    <th>Qty</th>
                    <th>Cost</th>
                    <th>Total</th>
                    <th></th>
                </tr>
                <tr ng-repeat="item in invoice.items">
                    <td>
                        <input type="text" ng-model="item.description" class="input-small">
                    </td>
                    <td>
                        <input type="number" ng-model="item.qty" ng-required class="input-mini">
                    </td>
                    <td>
                        <input type="number" ng-model="item.cost" ng-required class="input-mini">
                    </td>
                    <td>{{subTotal(item) | currency}}</td>
                    <td><button ng-click="deleteItem()" class="btn btn-small">delete item</button></td>
                </tr>
                <tr>
                    <td><button ng-click="addItem()" class="btn btn-small">add item</button>
                    </td>
                    <td></td>
                    <td>Total:</td>
                    <td>{{total() | currency}}</td>
                </tr>
            </table>  
        </div>
    </body>
</html>
/* Put your css in here */