diff --git a/Layout/default/Invoice/Index.php b/Layout/default/Invoice/Index.php
index 38ef41fd5..5ca715292 100644
--- a/Layout/default/Invoice/Index.php
+++ b/Layout/default/Invoice/Index.php
@@ -66,28 +66,28 @@ $pagination_entity_name = "Rechnungen";
                 <div class="col-6">
                     <div class="card">
                         <div class="card-body">
-                                <div class="row">
-                                    <div class="col-6">
-                                        <h4>Rechnungsversand</h4>
-                                        <form method="post" action="<?=self::getUrl("Invoice","sendInvoices")?>">
-                                            <div class="row">
-                                                <div class="col-6">
-                                                    <label class="form-label" for="delivery_start_date">Rechungsdatum von</label>
-                                                    <input type="text" class="form-control" name="delivery_start_date" id="delivery_start_date" value="" />
-                                                </div>
-                                                <div class="col-6">
-                                                    <label class="form-label" for="delivery_end_date">Rechungsdatum bis</label>
-                                                    <input type="text" class="form-control" name="delivery_end_date" id="delivery_end_date" value="" />
-                                                </div>
+                            <div class="row">
+                                <div class="col-6">
+                                    <h4>Rechnungsversand</h4>
+                                    <form method="post" action="<?=self::getUrl("Invoice","sendInvoices")?>">
+                                        <div class="row">
+                                            <div class="col-6">
+                                                <label class="form-label" for="delivery_start_date">Rechungsdatum von</label>
+                                                <input type="text" class="form-control" name="delivery_start_date" id="delivery_start_date" value="" />
                                             </div>
-                                            <div class="row mt-2">
-                                                <div class="col-12">
-                                                    <button name="type" value="paper" class="btn btn-lg btn-purple"><i class="far fa-fw fa-print"></i> Rechnungen für Postversand drucken</button>
-                                                </div>
+                                            <div class="col-6">
+                                                <label class="form-label" for="delivery_end_date">Rechungsdatum bis</label>
+                                                <input type="text" class="form-control" name="delivery_end_date" id="delivery_end_date" value="" />
                                             </div>
-                                        </form>
-                                    </div>
+                                        </div>
+                                        <div class="row mt-2">
+                                            <div class="col-12">
+                                                <button name="type" value="paper" class="btn btn-lg btn-purple"><i class="far fa-fw fa-print"></i> Rechnungen für Postversand drucken</button>
+                                            </div>
+                                        </div>
+                                    </form>
                                 </div>
+                            </div>
 
 
 
diff --git a/Layout/default/Invoice/PDF_MAIN.php b/Layout/default/Invoice/PDF_MAIN.php
index 01a1c80bb..a0b01e4b3 100644
--- a/Layout/default/Invoice/PDF_MAIN.php
+++ b/Layout/default/Invoice/PDF_MAIN.php
@@ -213,7 +213,7 @@ $this->setReturnValue(['filename' => $invoice->invoice_number . ".pdf"]);
                             <td style="text-align: right; padding-right: 8pt;"><?=number_format($zone->call_count, 0, ",",".")?></td>
                             <td style="text-align: right"><?=self::getHumanReadableInterval($zone->duration)?></td>
                             <td style="text-align: right"><?=number_format($zone->price_total, 4, ",",".")?> €</td>
-                            <td style="text-align: right; padding-right: 4pt;"><?=$zone->price_total_gross?> €</td>
+                            <td style="text-align: right; padding-right: 4pt;"><?=number_format($zone->price_total_gross, 4, ",",".")?> €</td>
                         </tr>
                     <?php $v++; ?>
                     <?php endforeach; ?>
diff --git a/application/Invoice/InvoiceController.php b/application/Invoice/InvoiceController.php
index 2f0d83587..78164942d 100644
--- a/application/Invoice/InvoiceController.php
+++ b/application/Invoice/InvoiceController.php
@@ -670,7 +670,7 @@ class InvoiceController extends mfBaseController {
 
     public function createPDFs() {
         $invoice_path_base = MFUPLOAD_FILE_SAVE_PATH."/".TT_INVOICE_SAVE_SUBFOLDER;
-        foreach(InvoiceModel::getAll() as $invoice) {
+        foreach(InvoiceModel::search(["billing_delivery" => "paper"]) as $invoice) {
             if(InvoiceFileModel::getFirst(["invoice_id" => $invoice->id])) {
                 continue;
             }
@@ -751,7 +751,6 @@ class InvoiceController extends mfBaseController {
     }
 
     public function printInvoices() {
-        return false;
         $start = $this->request->delivery_start_date;
         $end = $this->request->delivery_end_date;
 
@@ -774,28 +773,62 @@ class InvoiceController extends mfBaseController {
         $pdf_files = [];
 
         foreach(InvoiceModel::search(["billing_delivery" => "paper", "invoice_date>=" => $start_date->getTimestamp(), "invoice_date<=" => $end_date->getTimestamp()]) as $invoice) {
-            $filename = $invoice->createPdf();
-            if(!$filename) {
-                $this->layout()->setFlash("Fehler beim PDF erstellen (".$invoice->invoice_number.")", "error");
-                $this->redirect("Invoice");
+            $pdf = $invoice->pdf;
+
+            if(!$pdf || !$pdf->name) {
+                die("PDF für ".$invoice->invoice_number." noch nicht generiert\n");
             }
 
-            $pdf_files[] = $filename;
+            $pdf_file = $pdf->getFullPath();
+            if(!file_exists($pdf_file)) {
+                die("Datei ".$pdf->filename." nicht gefunden\n");
+            }
+
+            $pdf_files[] = $pdf_file;
         }
 
+        //var_dump($pdf_files);exit;
         if(!count($pdf_files)) {
             $this->layout()->setFlash("Fehler beim PDF erstellen: Keine PDFs zum zusammenführen", "error");
             $this->redirect("Invoice");
         }
 
         $output_path = MFUPLOAD_FILE_SAVE_PATH."/".TT_INVOICE_SAVE_SUBFOLDER;
-        $output_filename = "invoices-print-".date("Y-m-d-H-i-s").".pdf";
+        $output_filename = "print-invoices-".date("Y-m-d_H-i-s").".pdf";
         $output_filepath = "$output_path/$output_filename";
+        //var_dump($pdf_files);exit;
+        $i = 0;
 
+        $first = true;
+        $tmp_file1 = "$output_filepath.tmp1";
+        $tmp_file2 = "$output_filepath.tmp2";
+        $tmp_file = "";
         foreach($pdf_files as $file) {
-            $pdf_unite_cmd = PDFUNITE_BIN_PATH." '$file' '$output_filepath'";
+            if($i % 2 == 1) {
+                $tmp_file = $tmp_file1;
+                $src_file = $tmp_file2;
+            } else {
+                $tmp_file = $tmp_file2;
+                $src_file = $tmp_file1;
+            }
+
+            if($first) {
+                $pdf_unite_cmd = PDFUNITE_BIN_PATH." '$file' '$tmp_file'";
+                $first = false;
+            } else {
+                $pdf_unite_cmd = PDFUNITE_BIN_PATH." '$src_file' '$file' '$tmp_file'";
+            }
+
+
+            //echo "$pdf_unite_cmd\n<br />";
             shell_exec($pdf_unite_cmd);
+
+            $i++;
         }
+        //exit;
+        rename($tmp_file, $output_filepath);
+
+        //exit;
 
         if(!file_exists($output_filepath)) {
             $this->layout()->setFlash("Fehler beim PDFs zusammenführen: Ausgabedatei nicht gefunden", "error");