diff --git a/src/bigGrades.ts b/src/bigGrades.ts
index d91a3b5..508ada1 100644
--- a/src/bigGrades.ts
+++ b/src/bigGrades.ts
@@ -36,21 +36,63 @@ type StudentReportCard = {
 function computeFinalGrade(reportCard: StudentReportCard): number{
     let finalGrade = 0;
     for(let mark of reportCard.marks){
-        finalGrade += (mark.grade / mark.maxGrade) * mark.weight / 100
+        finalGrade += (mark.grade / mark.maxGrade) * mark.weight
     }
     return finalGrade;
 }
 
+function getGrade(studentId: number, examId: number, grades: Grade[]): number{
+    for(let grade of grades){
+        if(grade.examId === examId && grade.studentId === studentId){
+            return grade.grade;
+        }
+    }
+    return 0;
+}
+
+function createMarkForExam(studentId: number,
+                           exam: Exam,
+                           rawData: RawData): Mark{
+    return {
+        grade: getGrade(studentId, exam.examId, rawData.grades),
+        maxGrade: exam.maxGrade,
+        weight: exam.weight
+    };
+}
+
+function createMarks(studentId: number, rawData: RawData): Mark[]{
+    let ret: Mark[] = [];
+    for(let exam of rawData.exams){
+        ret.push(createMarkForExam(studentId, exam, rawData))
+    }
+    return ret;
+
+}
+function createStudentReportCard(student: Student,
+                                 rawData: RawData): StudentReportCard{
+    return {
+        studentId: student.studentId,
+        studentName: student.name,
+        marks: createMarks(student.studentId, rawData)
+    }
+}
 function transformData(rawData: RawData): StudentReportCard[]{
-
+    let ret: StudentReportCard[] = [];
+    for(let student of rawData.students){
+        ret.push(createStudentReportCard(student, rawData));
+    }
+    return ret;
 }
 
 
 
-function main(_rawData: RawData): void{
-
-
+function main(rawData: RawData): void{
+    let reportCards = transformData(rawData);
+    for(let reportCard of reportCards){
+        console.log(reportCard.studentName + " = " + computeFinalGrade(reportCard) )
+    }
 }
 
+main(rawData);