title: Sum column in google viz DataTable dashboard
body: <p>Here I have an simple demo: <a href="http://jsfiddle.net/36yve/" rel="nofollow">http://jsfiddle.net/36yve/</a></p>
  
  <pre><code>function drawVisualization() {
    // Prepare the data
    var data = google.visualization.arrayToDataTable([
      ['Name', 'Gender', 'Age', 'Donuts eaten'],
      ['Michael' , 'Male', 12, 5],
      ['Elisa', 'Female', 20, 7],
      ['Robert', 'Male', 7, 3],
      ['John', 'Male', 54, 2],
      ['Jessica', 'Female', 22, 6],
      ['Aaron', 'Male', 3, 1],
      ['Margareth', 'Female', 42, 8],
      ['Miranda', 'Female', 33, 6]
    ]);
  
    // Define a slider control for the Age column.
    var slider = new google.visualization.ControlWrapper({
      'controlType': 'NumberRangeFilter',
      'containerId': 'control1',
      'options': {
        'filterColumnLabel': 'Age',
      'ui': {'labelStacking': 'vertical'}
      }
    });
  
    // Define a category picker control for the Gender column
    var categoryPicker = new google.visualization.ControlWrapper({
      'controlType': 'CategoryFilter',
      'containerId': 'control2',
      'options': {
        'filterColumnLabel': 'Gender',
        'ui': {
        'labelStacking': 'vertical',
          'allowTyping': false,
          'allowMultiple': false
        }
      }
    });
  
    // Define a Pie chart
    var pie = new google.visualization.ChartWrapper({
      'chartType': 'PieChart',
      'containerId': 'chart1',
      'options': {
        'width': 300,
        'height': 300,
        'legend': 'none',
        'title': 'Donuts eaten per person',
        'chartArea': {'left': 15, 'top': 15, 'right': 0, 'bottom': 0},
        'pieSliceText': 'label'
      },
      // Instruct the piechart to use colums 0 (Name) and 3 (Donuts Eaten)
      // from the 'data' DataTable.
      'view': {'columns': [0, 3]}
    });
  
    // Define a table
    var table = new google.visualization.ChartWrapper({
      'chartType': 'Table',
      'containerId': 'chart2',
      'options': {
        'width': '300px'
      }
    });
  
    // Create a dashboard
    new google.visualization.Dashboard(document.getElementById('dashboard')).
        // Establish bindings, declaring the both the slider and the category
        // picker will drive both charts.
        bind([slider, categoryPicker], [pie, table]).
        // Draw the entire dashboard.
        draw(data);
  }
  </code></pre>
  
  <p>​all works fine.</p>
  
  <p><strong>What I want to know?</strong></p>
  
  <p>How I can add row at the end of table to sum column [Age and Donuts eaten] and also to work when I use filters-controls ?</p>
  
  <p>is there any solution for that problem?</p>