fixed import export

app/Imports/Sales/Invoices.php

@@ -8,10 +8,12 @@ use App\Imports\Sales\Sheets\InvoiceItemTaxes;
 use App\Imports\Sales\Sheets\InvoiceHistories;
 use App\Imports\Sales\Sheets\InvoiceTotals;
 use App\Imports\Sales\Sheets\InvoiceTransactions;
+use Illuminate\Contracts\Queue\ShouldQueue;
 use Maatwebsite\Excel\Concerns\Importable;
+use Maatwebsite\Excel\Concerns\WithChunkReading;
 use Maatwebsite\Excel\Concerns\WithMultipleSheets;
 
-class Invoices implements WithMultipleSheets
+class Invoices implements ShouldQueue, WithChunkReading, WithMultipleSheets
 {
     use Importable;
 
@@ -26,4 +28,9 @@ class Invoices implements WithMultipleSheets
             'invoice_transactions' => new InvoiceTransactions(),
         ];
     }
+
+    public function chunkSize(): int
+    {
+        return 100;
+    }
 }