Get Total Number of Records in Kendo Grid

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<html>
<head>
    <meta charset="utf-8">
    <title>Untitled</title>

    <link rel="stylesheet" href="http://kendo.cdn.telerik.com/2015.3.930/styles/kendo.common.min.css">
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</head>
<body>
    <div id="grid"></div>
    <script>
        $(document).ready(function () {


$("#grid").kendoGrid({
    selectable: "multiple cell",
    allowCopy: true,
    dataBound: onDataBound,
    columns: [
        { field: "productName" },
        { field: "category" }
    ],
    dataSource: [
        { productName: "Tea", category: "Beverages" },
        { productName: "Coffee", category: "Beverages" },
        { productName: "Ham", category: "Food" },
        { productName: "Bread", category: "Food" }
    ]
});

        })
        function onDataBound(e) {
            e.preventDefault();
            alert(this.dataSource.total());
        }
    </script>
</body>
</html>