diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index 6b077b5..9c2d690 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -364,6 +364,9 @@ Ticket Calculator::private_GetCostFromDuration(Configuration const* cfg,
 
         QTime const &lastWorktimeTo = worktime[ranges-1].getTimeUntil();
 
+        // qCritical() << "start" << start.toString(Qt::ISODate)
+        //             << "current" << current.toString(Qt::ISODate) << lastWorktimeTo;
+
         // find worktime range to start with
         int currentRange = 0;
         if (!isSpecialDay) {
@@ -386,6 +389,8 @@ Ticket Calculator::private_GetCostFromDuration(Configuration const* cfg,
             }
         }
 
+        // qCritical() << "current" << current.toString(Qt::ISODate);
+
         for (int w = currentRange; w < ranges; ++w, ++totalTimeRanges) {
             if (durationMinutes > 0) {
                 QTime const &worktime_from = worktime[w].getTimeFrom();
@@ -416,12 +421,13 @@ Ticket Calculator::private_GetCostFromDuration(Configuration const* cfg,
                         return Ticket();
                     }
                 } else {
-                    qDebug() << "* PREPAID MODE ACTIVE *";
+                    //qDebug() << "* PREPAID MODE ACTIVE *";
+                    //qCritical() << "current" << current.toString(Qt::ISODate) << worktime_from << lastWorktimeTo;
                     if (current.time() < worktime_from) {
                         current.setTime(worktime_from);
                         end = current;
                     } else if(current.time() > lastWorktimeTo) {
-                        qDebug() << " *** PREPAID *** Current time is past the time range end, searching for next available day";
+                        //qDebug() << " *** PREPAID *** Current time is past the time range end, searching for next available day";
                         end = current;
                         current.setTime(QTime());
                         continue;
@@ -442,6 +448,7 @@ Ticket Calculator::private_GetCostFromDuration(Configuration const* cfg,
                         current.setTime(QTime());
                         break; // stop while, and continue in outer loop
                     } else {
+                        //qCritical() << "current" << current.toString(Qt::ISODate) << worktime_to;
                         if(current.time() < worktime_to) {
                             // Increment input date minutes for each monetary unit
                             current = current.addSecs(60);
@@ -449,6 +456,7 @@ Ticket Calculator::private_GetCostFromDuration(Configuration const* cfg,
                             durationMinutes -= 1;
                             //costFromDuration += price_per_unit;
                             costFromDuration += price;
+                            //qCritical() << "current" << current.toString(Qt::ISODate);
                         } else break;
                     }
                 } // while(durationMinutes > 0) {