I need help with my logic.

I am trying to get this program to return the total number of grades entered as well as the total number of A's, B's C'a etc.
I am new at this and just needs some guidance.

Error:

Exception in thread "main" java.lang.Error: Unresolved compilation problems:
   Char cannot be resolved to a type
   numberOfA cannot be resolved
   numberOfB cannot be resolved
   numberOfC cannot be resolved
   numberOfD cannot be resolved
   numberOfF cannot be resolved

   at ExamScorer.main(ExamScorer.java:22)

public class ExamScorer
{
            public static void main(String[] args)
            {


               System.out.println("Enter exam score: ");
               int score;
               Char grade;
               int sum;
               int next;
               String answer;
               int countGrade = 0;
               int countScore = 0;
               Scanner keyboard = new Scanner(System.in);

               {
                System.out.println();
                System.out.println("Enter all of the exam scores.");
                sum=0;
                int NumberOfA = 0;
                int NumberOfB = 0;
                int NumberOfC = 0;
                int NumberOfD = 0;
                int NumberOfF = 0;
                next = keyboard.nextInt();
                score = keyboard.nextInt();
                grade = keyboard.next();

               }
                    sum = sum + next;
                numberOfA++;
                    numberOfB++;
                    numberOfC++;
                    numberOfD++;
                    numberOfF++;
                    next = keyboard.nextInt();


               if (score >= 90)
                grade = 'A';
               else if (score >= 80)
                grade = 'B';
               else if (score >= 70)
                grade = 'C';
               else if (score >= 60)
                grade = 'D';
               else
                  grade = 'F';