diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index 6444af0..59474fa 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -135,14 +135,20 @@ std::string Calculator::GetDurationFromCost(Configuration* cfg,
     static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
     int const paymentOptionIndex = cfg->getPaymentOptionIndex(permitType.get());
 
-    qCritical() << DBG_HEADER << "          start:" << inputDate.toString(Qt::ISODate);
-    qCritical() << DBG_HEADER << "   option index:" << paymentOptionIndex;
-    qCritical() << DBG_HEADER << "paymentMethodId:" << static_cast<int>(paymentMethodId);
-    qCritical() << DBG_HEADER << "        prepaid:" << prepaid;
-    qCritical() << DBG_HEADER << "   cost (price):" << cost;
+    if (DBG_LEVEL >= DBG_DEBUG) {
+        qCritical() << DBG_HEADER << "          start:" << inputDate.toString(Qt::ISODate);
+        qCritical() << DBG_HEADER << "   option index:" << paymentOptionIndex;
+        qCritical() << DBG_HEADER << "paymentMethodId:" << static_cast<int>(paymentMethodId);
+        qCritical() << DBG_HEADER << "        prepaid:" << prepaid;
+        qCritical() << DBG_HEADER << "   cost (price):" << cost;
+    }
 
     QList<int> tsteps = Calculator::GetInstance().GetTimeSteps(cfg, paymentOptionIndex, inputDate);
-    qCritical() << DBG_HEADER << "     time steps:" << tsteps;
+    if (DBG_LEVEL >= DBG_DEBUG) {
+        qCritical() << DBG_HEADER << "     time steps:" << tsteps;
+    } else {
+        Q_UNUSED(tsteps);
+    }
 
     if (paymentMethodId == PaymentMethod::Degressive) {
 
@@ -287,6 +293,9 @@ std::string Calculator::GetDurationFromCost(Configuration* cfg,
                         QTime pwd_time_from = QTime::fromString(QString::fromStdString(iter->second.pwd_time_from), Qt::ISODate);
                         QTime pwd_time_to = QTime::fromString(QString::fromStdString(iter->second.pwd_time_to), Qt::ISODate);
 
+                        //qCritical() << DBG_HEADER << "from" << pwd_time_from.toString(Qt::ISODate);
+                        //qCritical() << DBG_HEADER << "  to" << pwd_time_to.toString(Qt::ISODate);
+
                         if (inputDate.time() < pwd_time_from) {
                             inputDate.setTime(pwd_time_from);
                             useWeekDaysWorkTimeOfOtherDay = false;
@@ -465,6 +474,7 @@ std::string Calculator::GetDurationFromCost(Configuration* cfg,
                                                     QTime pwd_time_from = QTime::fromString(QString::fromStdString(iter->second.pwd_time_from), Qt::ISODate);
                                                     if (next_working_time_from < pwd_time_from) {
                                                         next_working_time_from = pwd_time_from;
+                                                        qCritical() << DBG_HEADER << "next working time from" << next_working_time_from.toString(Qt::ISODate);
                                                         break;
                                                     }
                                                 }