diff --git a/app/Helpers/Invoice/InvoiceItemSum.php b/app/Helpers/Invoice/InvoiceItemSum.php
index 3b55c8113817..4a8348b8c960 100644
--- a/app/Helpers/Invoice/InvoiceItemSum.php
+++ b/app/Helpers/Invoice/InvoiceItemSum.php
@@ -108,9 +108,9 @@ class InvoiceItemSum
         $this->line_items = [];
     }
 
-    public function process()
+    public function process(): self
     {
-        if (! $this->invoice->line_items || ! is_array($this->invoice->line_items) || count($this->invoice->line_items) == 0) {
+        if (!$this->invoice->line_items || !is_array($this->invoice->line_items)) {
             $this->items = [];
 
             return $this;
@@ -121,7 +121,7 @@ class InvoiceItemSum
         return $this;
     }
 
-    private function calcLineItems()
+    private function calcLineItems(): self
     {
         foreach ($this->invoice->line_items as $this->item) {
             $this->cleanLineItem()
diff --git a/app/Helpers/Invoice/InvoiceSum.php b/app/Helpers/Invoice/InvoiceSum.php
index 9bf0b7e7cb47..5097fac0c222 100644
--- a/app/Helpers/Invoice/InvoiceSum.php
+++ b/app/Helpers/Invoice/InvoiceSum.php
@@ -16,6 +16,7 @@ use App\Utils\Number;
 use App\Models\Credit;
 use App\Models\Invoice;
 use App\Models\PurchaseOrder;
+use App\Models\RecurringQuote;
 use App\Models\RecurringInvoice;
 use Illuminate\Support\Collection;
 use App\Utils\Traits\NumberFormatter;
@@ -27,7 +28,7 @@ class InvoiceSum
     use Discounter;
     use NumberFormatter;
 
-    protected RecurringInvoice | Invoice | Quote | Credit | PurchaseOrder $invoice;
+    protected RecurringInvoice | Invoice | Quote | Credit | PurchaseOrder | RecurringQuote $invoice;
 
     public $tax_map;
 
diff --git a/app/Http/Controllers/SelfUpdateController.php b/app/Http/Controllers/SelfUpdateController.php
index c7cdb99881e2..fcd642c284ae 100644
--- a/app/Http/Controllers/SelfUpdateController.php
+++ b/app/Http/Controllers/SelfUpdateController.php
@@ -99,9 +99,6 @@ class SelfUpdateController extends BaseController
 
         nlog('Extracting zip');
 
-        //clean up old snappdf installations
-        //$this->cleanOldSnapChromeBinaries();
-
         $zipFile = new \PhpZip\ZipFile();
 
         $zipFile->openFile($file);
@@ -144,29 +141,6 @@ class SelfUpdateController extends BaseController
         return response()->json(['message' => 'Update completed'], 200);
     }
 
-    private function cleanOldSnapChromeBinaries()
-    {
-        $current_revision = base_path('vendor/beganovich/snappdf/versions/revision.txt');
-        $current_revision_text = file_get_contents($current_revision);
-
-        $iterator = new \DirectoryIterator(base_path('vendor/beganovich/snappdf/versions'));
-
-        foreach ($iterator as $file) {
-            if ($file->isDir() && ! $file->isDot() && ($current_revision_text != $file->getFileName())) {
-                $directoryIterator = new \RecursiveDirectoryIterator(base_path('vendor/beganovich/snappdf/versions/'.$file->getFileName()), \RecursiveDirectoryIterator::SKIP_DOTS);
-
-                foreach (new \RecursiveIteratorIterator($directoryIterator) as $filex) {
-                    unlink($filex->getPathName());
-                }
-
-                $this->deleteDirectory(base_path('vendor/beganovich/snappdf/versions/'.$file->getFileName()));
-            }
-        }
-
-        $iterator = null;
-        
-    }
-
     private function deleteDirectory($dir)
     {
         if (! file_exists($dir)) {