                  formatter: function(val) {
                                    return val;
                                }
                            },
                            total: {
                                show: true,
                                label: 'Total',
                                color: '#9ca3af',
                                formatter: function(w) {
                                    return w.globals.seriesTotals.reduce((a, b) => a + b, 0);
                        