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Show the total value for stacking series in data label

By using the annotation, you can show any element in desired view.

To show the total value in data points, follow the given steps:

Step 1:

Define annotation for each x point in chart, now change the annotation value in chart by using the annotationRender event. In this event, assign the stacked value of the last series to the annotation to show the total value of the stacking series.

Source
Preview
index.ts
index.html
import { ChartAnnotation, Chart, StackingColumnSeries, Category, DataLabel, Tooltip, ILoadedEventArgs,IAnnotationRenderEventArgs, Points } from '@syncfusion/ej2-charts';
Chart.Inject(StackingColumnSeries, ChartAnnotation, DataLabel, Category, Tooltip);
import { EmitType } from '@syncfusion/ej2-base';
    let i: number = 0;
    let chart: Chart = new Chart({
        //Initializing Primary X and Y Axis
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
        // Initialize the chart series
        series: [
            {
                type: 'StackingColumn', xName: 'x', width: 2, yName: 'y', name: 'Apple', animation: {enable: false},
                dataSource: [{ x: 'Jamesh', y: 5 }, { x: 'Michael', y: 4 }, { x: 'John', y: 5 }],
                marker: { dataLabel: { visible: true, position: 'Top', font: { fontWeight: '600', color: '#ffffff' } } }
            }, {
                type: 'StackingColumn', xName: 'x', width: 2, yName: 'y', name: 'Orange',  animation: {enable: false},
                dataSource: [{ x: 'Jamesh', y: 4 }, { x: 'Michael', y: 3 }, { x: 'John', y: 4 }],
                marker: { dataLabel: { visible: true, position: 'Top', font: { fontWeight: '600', color: '#ffffff' } } }
            },
            {
                type: 'StackingColumn', xName: 'x', width: 2, yName: 'y', name: 'Grapes', animation: {enable: false},
                dataSource: [{ x: 'Jamesh', y: 1 }, { x: 'Michael', y: 2 }, { x: 'John', y: 2 }],
                marker: { dataLabel: { visible: true, position: 'Top', font: { fontWeight: '600', color: '#ffffff' } } }
            }
        ],
        annotations:[
            {
               content: '<div id="point1" style="font-size:11px;font-weight:bold;color:gray;fill:gray;"><span>12</span></div>',
               x: 'Jamesh', y: '11', coordinateUnits: 'Point', region: 'Series'
            },
            {
               content: '<div id="point1" style="font-size:11px;font-weight:bold;color:gray;fill:gray;"><span>12</span></div>',
               x: 'Michael', y: '10', coordinateUnits: 'Point', region: 'Series'
            },
            {
               content: '<div id="point1" style="font-size:11px;font-weight:bold;color:gray;fill:gray;"><span>12</span></div>',
               x: 'John', y: '12', coordinateUnits: 'Point', region: 'Series'
            }
        ],
        // Initialize the chart title
        title: 'Fruit Consumption', tooltip: { enable: true, shared: true },
        annotationRender: (args: IAnnotationRenderEventArgs) => {
          let length = chart.series.length - 1;
          let value = chart.series[length].stackedValues.endValues[i];
          i += (i == length) ? -length : 1;
          args.content.children[0].children[0].innerHTML = value;
        }
    width:'650px',
    height: '350px'
    });
    chart.appendTo('#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="http://npmci.syncfusion.com/packages/development/material.css" rel="stylesheet">
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div class="col-sm-8">
            <div class="row">
                <div class="col-sm-4">  
                  <div id='container'>
                    <div id='element'  style="width:350px; height:350px;float:left">
                    </div>
                    <label id="lbl"></label>
                  </div>
                </div>
                <div class="col-sm-4" style="width:200px; height:350px;float: right">
                  <div id='Grid'>
                  </div>
                </div>
            </div>
    </div>
</body> 
</html>