diff --git a/library/include/mobilisis/utilities.h b/library/include/mobilisis/utilities.h
index 74dad3f..09de817 100644
--- a/library/include/mobilisis/utilities.h
+++ b/library/include/mobilisis/utilities.h
@@ -68,6 +68,6 @@ public:
 	/// </summary>
 	/// <param name="pra_price"></param>
 	/// <returns></returns>
-	static double CalculatePricePerUnit(double pra_price);
+    static double CalculatePricePerUnit(double pra_price, double durationUnit = -1);
 
 };
diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index 2ffceaa..39dbec8 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -177,8 +177,12 @@ std::string Calculator::GetDurationFromCost(Configuration* cfg,
     else
     {
         // Set new price for the normal day
-        day_price = cfg->PaymentRate.find(payment_option)->second.pra_price;
-        price_per_unit = Utilities::CalculatePricePerUnit(day_price);
+        int pop_id = cfg->PaymentOption.find(payment_option)->second.pop_id;
+        day_price = cfg->PaymentRate.find(pop_id)->second.pra_price;
+
+        int durationId = cfg->PaymentRate.find(pop_id)->second.pra_payment_unit_id;
+        double durationUnit = cfg->Duration.find(durationId)->second.pun_duration;
+        price_per_unit = Utilities::CalculatePricePerUnit(day_price,durationUnit);
 
         // If no working day found, skip it (recursively call method again)
         size_t found = 0;
@@ -410,8 +414,13 @@ double Calculator::GetCostFromDuration(Configuration* cfg, uint8_t payment_optio
     else
     {
         // Set new price for the normal day
-        day_price = cfg->PaymentRate.find(payment_option)->second.pra_price;
-        price_per_unit = Utilities::CalculatePricePerUnit(day_price);
+
+        int pop_id = cfg->PaymentOption.find(payment_option)->second.pop_id;
+        day_price = cfg->PaymentRate.find(pop_id)->second.pra_price;
+
+        int durationId = cfg->PaymentRate.find(pop_id)->second.pra_payment_unit_id;
+        double durationUnit = cfg->Duration.find(durationId)->second.pun_duration;
+        price_per_unit = Utilities::CalculatePricePerUnit(day_price,durationUnit);
 
         // If no working day found, skip it (recursively call method again)
         size_t found = 0;
@@ -506,11 +515,12 @@ double Calculator::GetCostFromDuration(Configuration* cfg, uint8_t payment_optio
             return 0.0f;
         }
 
+        int carry_over_status = 0;
+        carry_over_status = cfg->PaymentOption.find(payment_option)->second.pop_carry_over;
+
         // Go to next day if minutes not spent
         if(inputDate.time() >= worktime_to)
         {
-            int carry_over_status = 0;
-            carry_over_status = cfg->PaymentOption.find(payment_option)->second.pop_carry_over;
             if (carry_over_status < 1) break;
 
             LOG_DEBUG("Reached end of worktime, searching for the next working day");
diff --git a/library/src/configuration.cpp b/library/src/configuration.cpp
index 70e61c7..ea5f587 100644
--- a/library/src/configuration.cpp
+++ b/library/src/configuration.cpp
@@ -210,7 +210,7 @@ bool Configuration::ParseJson(Configuration* cfg, const char* json)
 					cfg->PaymentMethod.insert(pair<int, ATBPaymentMethod>(PaymentMethod.pme_id, PaymentMethod));
 					break;
 				case MemberType::PaymentRateType:
-					cfg->PaymentRate.insert(pair<int, ATBPaymentRate>(PaymentRate.pra_payment_unit_id, PaymentRate));
+                    cfg->PaymentRate.insert(pair<int, ATBPaymentRate>(PaymentRate.pra_payment_option_id, PaymentRate));
 					break;
 				case MemberType::PaymentOptionType:
 					cfg->PaymentOption.insert(pair<int, ATBPaymentOption>(PaymentOption.pop_payment_method_id, PaymentOption));
diff --git a/library/src/utilities.cpp b/library/src/utilities.cpp
index 48cf880..cb5d896 100644
--- a/library/src/utilities.cpp
+++ b/library/src/utilities.cpp
@@ -8,12 +8,15 @@ static int protection_counter = 0;
 /// </summary>
 /// <param name="pra_price"></param>
 /// <returns></returns>
-double Utilities::CalculatePricePerUnit(double pra_price)
+double Utilities::CalculatePricePerUnit(double pra_price, double durationUnit)
 {
 	try
 	{
 		double price_per_unit = pra_price;
-		price_per_unit /= 60.0f; // Divided by 60 because price per unit is set per hour and we are using minutes
+        double unit = durationUnit;
+
+        if(unit < 0 || unit > 65535 ) unit = 60.0f;
+        price_per_unit /= unit; // Divided by 60 because price per unit is set per hour and we are using minutes
 		//printf("Price per unit (min) is: %lf\n", price_per_unit);
 		return price_per_unit;
 	}
diff --git a/main/main.cpp b/main/main.cpp
index 2bc05e9..b315a34 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -71,7 +71,7 @@ int main() {
         memset(&price, 0x00, sizeof(price));
         QDateTime start = QDateTime::fromString("2023-05-11T07:50:00",Qt::ISODate); //QDateTime::currentDateTime();
         time_t start_parking_time = start.toSecsSinceEpoch() / 60;
-        time_t end_parking_time = start_parking_time + 1230;
+        time_t end_parking_time = start_parking_time + 615;
 
         if (compute_price_for_parking_ticket(tariff,
                                              start_parking_time,