diff --git a/main/main.cpp b/main/main.cpp
index 86a9147..8c406c5 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -50,12 +50,20 @@ int main() {
 
     if (isParsed)
     {
-        QDateTime start = QDateTime::fromString("2023-11-27T17:50:00",Qt::ISODate);
+        QDateTime start = QDateTime::fromString("2023-12-08T17:50:00",Qt::ISODate);
         //QDateTime start = QDateTime::currentDateTime();
         QDateTime end = start.addSecs(120);
-        uint32_t cost = calculator.GetCostFromDuration(&cfg, 3, start, end, 60);
+        uint32_t cost = calculator.GetCostFromDuration(&cfg, 3, start, end, 30);
+
         qCritical() << "cost=" << cost;
         qCritical() << "end=" << end;
+
+        std::string duration = calculator.GetDurationFromCost(&cfg, 3,
+                                                              start.toString(Qt::ISODate).toStdString().c_str(),
+                                                              60);
+
+        qCritical() << "duration=" << duration.c_str();
+
     }
 
     return 0;