diff --git a/ReportImp/KetteReports/Invoicing/CustomInvoiceCreation.cs b/ReportImp/KetteReports/Invoicing/CustomInvoiceCreation.cs
index a2d67e2a1..403e3be68 100644
--- a/ReportImp/KetteReports/Invoicing/CustomInvoiceCreation.cs
+++ b/ReportImp/KetteReports/Invoicing/CustomInvoiceCreation.cs
@@ -17,6 +17,86 @@ namespace KetteReports.Invoicing
 {
 	public class CustomInvoiceCreation : InvoiceCreation
 	{
+		public override IList<InvoiceItem> CreateInvoiceItems(List<ServiceRecordDC> serviceRecordsInPeriod, DateTimeSpan invoicePeriod, SupportConceptApprovalPeriod scap, Calculations calc)
+        {
+            CompactCustomerDC c = new CompactCustomerDC();
+            if (serviceRecordsInPeriod.Count > 0)
+                c = serviceRecordsInPeriod[0].Customer;
+
+            ServiceRecordDC lastSR = null;
+            var list = new List<InvoiceItem>();
+            serviceRecordsInPeriod = serviceRecordsInPeriod.OrderBy(sr => sr.Start).ToList();
+            foreach (ServiceRecordDC iServiceRecord in serviceRecordsInPeriod)
+            {
+                if (iServiceRecord.ServiceDescription.Category.IsBillable)
+                {
+                    //Wenn eine Lücke zwischen dem letzten Item und dem aktuellen existiert, ersten und letzten Tag der Lücke setzen und
+                    // bei jedem Tag prüfen, ob es eine Abwesenheit für Customer c gibt und wenn ja, ein Item erzeugen, was den 0.75-Faktor hat
+                    // Das wird solange gemacht, bis die komplette Lücke geschlossen ist, also bis für jeden Abwesenheitstag ein Eintrag mit Faktor da ist
+                    if (lastSR != null && lastSR.Start.Value.Date.AddDays(1) < iServiceRecord.Start.Value.Date && (iServiceRecord.ServiceDescription.Category.Name == "GW" || iServiceRecord.ServiceDescription.Category.Name == "GW BuHi"))
+                    {
+                        var lueckeStart = lastSR.Start.Value.AddDays(1);
+                        var lueckeEnd = iServiceRecord.Start.Value.AddDays(-1);
+                        while (lueckeStart <= lueckeEnd)
+                        {
+                            foreach (var abs in c.AbsenceTimes)
+                            {
+                                InvoiceItem invoiceItem = CheckForAbsenceTime(abs, lueckeStart, lastSR, scap, calc);
+                                if (invoiceItem != null && !list.Any(item => item.ItemPeriodStart.Value.Date == invoiceItem.ItemPeriodStart.Value.Date && item.ServiceRecord.ServiceDescription.ServiceCategory.Name.ToLower().Contains("gw")))
+                                    list.Add(invoiceItem);
+                                lastSR.Start = lueckeStart;
+                                lastSR.End = new DateTime(lueckeStart.Year, lueckeStart.Month, lueckeStart.Day, lastSR.End.Value.Hour,
+                                                                                lastSR.End.Value.Minute, lastSR.End.Value.Second);
+                            }
+
+                            lueckeStart = lueckeStart.AddDays(1);
+                        }
+                    }
+                    if (!iServiceRecord.AlreadyAccounted)
+                    {
+                        if (iServiceRecord.ServiceDescription.Category.Name == "GW" || iServiceRecord.ServiceDescription.Category.Name == "GW BuHi")
+                        {
+                            var ii = CreateInvoiceItem(iServiceRecord, scap, calc);
+                            if (ii != null)
+                            {
+                                if (!list.Any(item => item.ItemPeriodStart.Value.Date == ii.ItemPeriodStart.Value.Date && item.ServiceRecord.ServiceDescription.ServiceCategory.Name.ToLower().Contains("gw")))
+                                {
+                                    list.Add(ii);
+                                    iServiceRecord.AlreadyAccounted = true;
+                                }
+                            }
+                        }
+                        else
+                        {
+                            InvoiceItem invoiceItem = CreateInvoiceItem(iServiceRecord, scap, calc);
+                            if (invoiceItem != null)
+                                list.Add(invoiceItem);
+
+                            iServiceRecord.AlreadyAccounted = true;
+                        }
+                    }
+                }
+                lastSR = iServiceRecord;
+            }
+
+            return CreateSummaryInvoiceItems(list, invoicePeriod, scap, calc);
+        }
+
+        private InvoiceItem CheckForAbsenceTime(AbsenceTimeDC abs, DateTime datum, ServiceRecordDC lastSR, SupportConceptApprovalPeriod scap, Calculations calc)
+        {
+            if (abs.AbsenceSpan.ContainsDate(datum))
+            {
+                var abwesenheitsSR = lastSR;
+                abwesenheitsSR.Start = datum;
+                abwesenheitsSR.End = new DateTime(datum.Year, datum.Month, datum.Day, lastSR.End.Value.Hour,
+                                                            lastSR.End.Value.Minute, lastSR.End.Value.Second);
+                InvoiceItem invoiceItem = CreateInvoiceItem(abwesenheitsSR, scap, calc);
+
+                return invoiceItem;
+            }
+            return null;
+        }
+
 		public override InvoiceItem CreateInvoiceItem(ServiceRecordDC iServiceRecord, SupportConceptApprovalPeriod scap, Calculations calc)
 		{
 			var ii = base.CreateInvoiceItem(iServiceRecord, scap, calc);