공장제조관리 1번문제 점검 부탁드립니다

Sub main()
    ''필수변수선언
        Dim 인수1, 인수2, i, 버퍼 As Variant
       
    ''핵심변수선언
        Dim 제조등급, 매출액, 판매량, 제조포인트, 합계(1000), j, temp, num As Variant
       
    ''인수선언
        인수1 = Val(Left(Command, InStr(Command, " ")))
        인수2 = Val(Mid(Command, InStr(Command, " ")))
    ''입력파일처리
        Open "c:\c_it\data\abc05.txt" For Input As #1
            For i = 1 To 인수2
                Line Input #1, 버퍼
                    If i >= 인수1 Then
                        ''변수저장
                            제조등급 = Trim(Mid(버퍼, 29, 1))
                            매출액 = Val(Mid(버퍼, 26, 3))
                            판매량 = Val(Mid(버퍼, 15, 3))
                            제조포인트 = Val(Mid(버퍼, 20, 3))
                           
                   
                        ''합계구하기
                            If 제조등급 = "c" And 매출액 >= 80 Then
                                num = num + 1
                                합계(num) = 판매량 + 제조포인트
                            End If
                           
                      End If
                       
             Next i
                        ''정렬알고리즘(내림차순)
                            For i = 1 To num
                                For j = i To num
                                    If 합계(i) < 합계(j) Then
                                        temp = 합계(i)
                                        합계(i) = 합계(j)
                                        합계(j) = temp
                                       
                                    End If
                                Next j
                               
                            Next i
            Close #1
           
    ''출력파일처리
        Open "c:\c_it\data\ans1.txt" For Output As #2
        Print #2, 인수1, 인수2, 합계(5)
        Close #2
End Sub