diff --git a/Web/app.py b/Web/app.py
index a90c332..9d628e6 100755
--- a/Web/app.py
+++ b/Web/app.py
@@ -3157,7 +3157,7 @@ def library_loans_admin():
                 'damage_text': (damage_reports[0].get('description', '') if damage_reports else ''),
                 'available': bool(item_doc.get('Verfuegbar', False)),
                 'last_updated': fmt_dt(item_doc.get('LastUpdated')),
-                'acquisition_costs': fmt_money(item_doc.get('Anschaffungskosten'))
+                'acquisition_costs': item_doc.get('Anschaffungskosten', "")
             })
 
         return render_template(
diff --git a/Web/templates/library_borrowings_admin.html b/Web/templates/library_borrowings_admin.html
index 4fdb2b2..d3ae9ed 100644
--- a/Web/templates/library_borrowings_admin.html
+++ b/Web/templates/library_borrowings_admin.html
@@ -520,7 +520,16 @@
   window.openDamageReportPrompt = openDamageReportPrompt;
 
   function openDamageInvoiceModal(row, description) {
-    if (!damageInvoiceModal || !damageInvoiceForm) {
+    const modal = document.getElementById('damage-invoice-modal');
+    const form = document.getElementById('damage-invoice-form');
+    const inputItem = document.getElementById('damage-invoice-item');
+    const inputBorrower = document.getElementById('damage-invoice-borrower');
+    const inputCode = document.getElementById('damage-invoice-code');
+    const inputAmount = document.getElementById('damage-invoice-amount');
+    const inputReason = document.getElementById('damage-invoice-reason');
+
+    if (!modal || !form) {
+      console.error("Modal oder Formular nicht gefunden.");
       return;
     }
 
@@ -530,25 +539,29 @@
     const itemCode = row.dataset.itemCode || '';
     const itemCost = row.dataset.itemCost || '';
 
-    document.getElementById("damage-invoice-amount").value = "{{ item.acquisition_costs }}";
+    form.action = "{{ url_for('admin_create_invoice', borrow_id='__BORROW_ID__') }}".replace('__BORROW_ID__', borrowId);
 
-    damageInvoiceForm.action = "{{ url_for('admin_create_invoice', borrow_id='__BORROW_ID__') }}".replace('__BORROW_ID__', borrowId);
-    damageInvoiceItem.value = itemName;
-    damageInvoiceBorrower.value = borrower;
-    damageInvoiceCode.value = itemCode;
-    damageInvoiceAmount.value = String(itemCost).replace(' EUR', '').trim();
-    damageInvoiceReason.value = description || `Schaden gemeldet für ${itemName}`;
-    damageInvoiceModal.style.display = 'block';
-    damageInvoiceAmount.focus();
+    inputItem.value = itemName;
+    inputBorrower.value = borrower;
+    inputCode.value = itemCode;
+
+    inputAmount.value = String(itemCost).replace(' EUR', '').trim();
+
+    inputReason.value = description || `Schaden gemeldet für ${itemName}`;
+
+    modal.style.display = 'block';
+    inputAmount.focus();
+  }
+
+  function closeDamageInvoiceModal() {
+    const modal = document.getElementById('damage-invoice-modal');
+    if (modal) {
+      modal.style.display = 'none';
+    }
   }
 
   window.openDamageInvoiceModal = openDamageInvoiceModal;
-
-  function closeDamageInvoiceModal() {
-    if (damageInvoiceModal) {
-      damageInvoiceModal.style.display = 'none';
-    }
-  }
+  window.closeDamageInvoiceModal = closeDamageInvoiceModal;
 
   if (damageInvoiceModal) {
     damageInvoiceModal.addEventListener('click', function(event) {