Update

app/Http/Controllers/ChartController.php

@@ -145,6 +145,27 @@ class ChartController extends Controller
             ];
         });
 
+        if ($series->isNotEmpty()) {
+            $data = [];
+
+            foreach ($series as $serie) {
+                foreach ($serie['data'] as $k => $v) {
+                    if (is_null($v)) {
+                        $data[$k] = $data[$k] ?? null;
+                    } elseif (isset($data[$k])) {
+                        $data[$k] += $v;
+                    } else {
+                        $data[$k] = $v;
+                    }
+                }
+            }
+
+            $series->push([
+                'name' => '总量',
+                'data' => $data,
+            ]);
+        }
+
         return [
             'x_axis' => array_values($quarters),
             'series' => $series->values()->all(),