Requirement appears to have been changed, so the original reply is no longer true - suggestion removed.

Step1:

Exesute the SORT program with SORTIN DD DSN=your input file(FILE1).

SORTXSUM DD DSN=FILE2

SORTOUT DD DSN=FILE3

Your sort card will be

SORT FIELDS=(1,,CH,A)

SUM FIELDS=NONE,XSUM

Step2:

Exesute the SORT program with SORTIN DD DSN=FILE2

SORTXSUM DD DSN=FILE4

SORTOUT DD DSN=FILE5

Your sort card will be

SORT FIELDS=(1,,CH,A)

SUM FIELDS=NONE,XSUM

Step3:

Exesute the SORT program with SORTIN DD DSN=FILE4

SORTXSUM DD DSN=FILE6

SORTOUT DD DSN=FILE7

Your sort card will be

SORT FIELDS=(1,,CH,A)

SUM FIELDS=NONE,XSUM

Step4:

Merge FILE3, FILE5 and FILE7. You will get the desired O/P.

Sujoy Ghosh.