JSFiddle - React, Tailwind, and code Playground

HTML

<script type="text/javascript" src="http://highcharts.com/js/testing.js"></script>

<div id="container" style="height: 300px"></div>

JavaScript

var chart = new Highcharts.Chart({

    chart: {
        renderTo: 'container',
        type: 'column'
    },

    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr']
    },

    yAxis: {
        stackLabels: {
            enabled: true,
            formatter: function(){
                return 1;
            }
        }
    },
    
    series: [{
        data: [29.9, 71.5, 106.4, 129.2]
    },{ 
        data: [144.0, 176.0, 135.6, 148.5]
    },{ 
        data: [216.4, 194.1, 95.6, 54.4]
    }]
}, function(chart){

    var series = chart.series,
        axis = chart.xAxis[0],
        categories = axis.categories,
        cl = categories.length, 
        sl = series.length, 
        i=0, j, sum;
    
    
    for (; i<cl; i++) {
        for(j=0, sum=0; j<sl; j++)
            sum += series[j].data[i].y

        categories[i] += '<br/>' + sum.toFixed(2)
    }


    chart.setSize(chart.chartWidth, chart.chartHeight);
});