cumulative Sum or moving sum in Informatica

CUME (PERSONAL_SALES)

 PERSONAL_SALES      RETURN VALUE

40000                40000

80000                120000

40000                160000

60000                220000

MOVINGSUM (SALES,2)

ROW_NO              SALES      RETURN VALUE

1                600               NULL

2                504               1104 (600+504)

3                36                 540 (504+36)

4                100               136 (36+100)

5                550               650 (100+550)

6                39                 589 (550+39)

7                490               529 (39+490)