diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index 005dd71..73459dc 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -679,6 +679,17 @@ Calculator::GetDurationFromCost(Configuration* cfg,
             qCritical() << DBG_HEADER << "   TODO";
         }
     } else
+    if (paymentMethodId == PaymentMethod::Unified) {
+        std::pair<CalcState, QDateTime> r =
+            ComputeDurationFromCost(cfg, QDateTime::fromString(startDatetimePassed, Qt::ISODate), cost);
+
+        CalcState cs = r.first;
+
+        qCritical() << __func__ << ":" << __LINE__ << cs.toString();
+        qCritical() << __func__ << ":" << __LINE__ << r.second.toString(Qt::ISODate);
+
+        return std::make_pair(r.first.toString().toStdString(), r.second);
+    } else
     if (paymentMethodId == PaymentMethod::Steps) {
         if (tariffIs24_7(cfg)) {
             // use tariff with structure as for instance Schoenau, Koenigsee: