diff --git a/src/g2_2025_grade_calculator_pkg/CMakeLists.txt b/src/g2_2025_grade_calculator_pkg/CMakeLists.txt
index e773c79..796be24 100644
--- a/src/g2_2025_grade_calculator_pkg/CMakeLists.txt
+++ b/src/g2_2025_grade_calculator_pkg/CMakeLists.txt
@@ -36,11 +36,21 @@ target_link_libraries(exam_result_generator pqxx pq tomlplusplus::tomlplusplus)
 
 add_executable(final_grade_determinator
     src/final_grade_determinator/main.cpp
+    src/database/DatabaseManager.cpp
+    src/config/ConfigManager.cpp
+    src/final_grade_determinator/nodes/FinalGradeDeterminator.cpp
+)
+target_include_directories(final_grade_determinator PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/src
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/final_grade_determinator
 )
 ament_target_dependencies(final_grade_determinator rclcpp g2_2025_interfaces)
+target_link_libraries(final_grade_determinator pqxx pq tomlplusplus::tomlplusplus)
+
 
 add_executable(grade_calculator
     src/grade_calculator/main.cpp
+    src/grade_calculator/nodes/GradeCalculator.cpp
 )
 ament_target_dependencies(grade_calculator rclcpp g2_2025_interfaces)
 
diff --git a/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.cpp b/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.cpp
index 199228d..2333903 100644
--- a/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.cpp
+++ b/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.cpp
@@ -3,7 +3,9 @@
 namespace assignments::one::final_grade_determinator {
 
 FinalGradeDeterminator::FinalGradeDeterminator() : Node("final_grade_determinator") {
-
+    this->declare_parameter("grade_collection_amount", 5);
+    grade_collection_ammount_ = this->get_parameter("grade_collection_amount").as_int();
+    db_manager_ = std::make_unique<DatabaseManager>(this->get_logger());
 
     // Create publisher for exam results
     student_publisher_ = this->create_publisher<g2_2025_interfaces::msg::Student>("student_course_management", 10);
@@ -26,20 +28,52 @@ void FinalGradeDeterminator::exam_results_callback(const g2_2025_interfaces::msg
     studentCourseCombo_.course_name     = msg->course_name;
     
     dataMap_[studentCourseCombo_].push_back(msg->result);
-    if (dataMap_[studentCourseCombo_].size() == PARAM)
+    if (dataMap_[studentCourseCombo_].size() == static_cast<unsigned long>(grade_collection_ammount_))
     {
         RCLCPP_INFO(this->get_logger(),
-        "%s // %s is full",
+        "%s // %s: results sent to calculator",
         msg->student_name.c_str(), msg->course_name.c_str()
-    );
+        );
+        grade_calculator_request(studentCourseCombo_);
     }
 }
 
-void FinalGradeDeterminator::grade_calculator_response(rclcpp::Client<g2_2025_interfaces::srv::Exams>::SharedFuture future){
+void FinalGradeDeterminator::grade_calculator_request(StudentCourse combo) {
+    if (!exam_service_client_->wait_for_service(std::chrono::seconds(1))) {
+			RCLCPP_WARN(this->get_logger(), "Service not available");
+			return;
+	}
+
+    auto request = std::make_shared<g2_2025_interfaces::srv::Exams::Request>();
+    request->course_name = combo.course_name;
+    request->student_name = combo.student_name;
+    request->exam_grades = dataMap_[combo];
+    
+    auto callback = [this, combo](rclcpp::Client<g2_2025_interfaces::srv::Exams>::SharedFuture future) {
+        this->grade_calculator_response(future, combo);
+    };
+    exam_service_client_->async_send_request(request, callback);
+}
+
+void FinalGradeDeterminator::grade_calculator_response(rclcpp::Client<g2_2025_interfaces::srv::Exams>::SharedFuture future, StudentCourse studentCourseCombo){
+    if (!db_manager_ || !db_manager_->is_connected()) {
+        RCLCPP_WARN(this->get_logger(), "no database connection");
+        return;
+    }
+    
     auto response = future.get();
-    // StudentCourse passthrough;
-    // passthrough.course_name
-    // db_manager_->store_final_course_result();
+
+    auto student_message = g2_2025_interfaces::msg::Student();
+    student_message.student_name = studentCourseCombo.student_name;
+    student_message.course_name = studentCourseCombo.course_name;
+    student_message.timestamp = this->now();
+    student_publisher_->publish(student_message);
+
+    RCLCPP_INFO(this->get_logger(),
+        "%s // %s is %d",
+        studentCourseCombo.student_name.c_str(), studentCourseCombo.course_name.c_str(), response->result
+    );
+    db_manager_->store_final_course_result(studentCourseCombo, grade_collection_ammount_, response->result);
 }
 
 } // namespace assignments::one::final_grade_determinator
diff --git a/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.hpp b/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.hpp
index f19b374..ae2c98e 100644
--- a/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.hpp
+++ b/src/g2_2025_grade_calculator_pkg/src/final_grade_determinator/nodes/FinalGradeDeterminator.hpp
@@ -4,6 +4,7 @@
 #include <string>
 #include <random>
 #include <vector>
+#include <chrono>
 
 #include "rclcpp/rclcpp.hpp"
 #include "g2_2025_interfaces/msg/exam.hpp"
@@ -31,9 +32,11 @@ private:
     StudentCourse studentCourseCombo_;
     StudentCourseResultMap dataMap_;
 
-     
-
+    //Params:
+    int grade_collection_ammount_;
+    //Functions:
+    void grade_calculator_request(StudentCourse combo);
     void exam_results_callback(const g2_2025_interfaces::msg::Exam::SharedPtr msg);
-    void grade_calculator_response(rclcpp::Client<g2_2025_interfaces::srv::Exams>::SharedFuture future);
+    void grade_calculator_response(rclcpp::Client<g2_2025_interfaces::srv::Exams>::SharedFuture future, StudentCourse studentCourseCombo);
 };
 } // namespace assignments::one::final_grade_determinator
\ No newline at end of file