output:
- data: begin of SERIES,
- N1 type I value 10,
- N2 type I value 20,
- N3 type I value 30,
- N4 type I value 40,
- N5 type I value 50,
- N6 type I value 60,
- end of SERIES.
- data SUM type I.
- add SERIES-N1 then SERIES-N2 until SERIES-N5 giving SUM.
- write SUM.
- add SERIES-N2 then SERIES-N3 until SERIES-N6 to SUM.
- write / SUM.
150 350