diff --git a/ReportImp/VereinBeratungTherapie/Invoicing/CollectiveInvoiceCreation.cs b/ReportImp/VereinBeratungTherapie/Invoicing/CollectiveInvoiceCreation.cs
index 9bc074094..d5d0b871a 100644
--- a/ReportImp/VereinBeratungTherapie/Invoicing/CollectiveInvoiceCreation.cs
+++ b/ReportImp/VereinBeratungTherapie/Invoicing/CollectiveInvoiceCreation.cs
@@ -240,8 +240,9 @@ namespace VereinBeratungTherapie.Invoicing
                                     // KA wird auf nächste halbe Stunde gerundet...
                                     lgMin = Math.Round(lgMin / 30) * 30;
                                     preisLG = data[0].AmountTotal.Value;
-                                    preis = Math.Round(preisLG / 60, 4, MidpointRounding.AwayFromZero);
-                                    ii.AmountPerUnit = Math.Round(preis * lgMin, 2, MidpointRounding.AwayFromZero);
+                                    //preis = Math.Round(preisLG / 60, 4, MidpointRounding.AwayFromZero);
+                                    //ii.AmountPerUnit = Math.Round(preis * lgMin, 2, MidpointRounding.AwayFromZero);
+                                    ii.AmountPerUnit = Math.Round(lgMin / 60 * preisLG, 2, MidpointRounding.AwayFromZero);
                                     ii.AmountTotal = ii.UnitCount * ii.AmountPerUnit;
                                 }
                             }