converting 3 materials into one finished good

hello experts,

i am trying to convert 3 materials into one finished good,but still getting three seperate values intead of accumulated value.

Transformation file looks as below

PLANT = 0PLANT

TIME    = 0FISCPER

FG       = ZMATERIAL

ACCOUNT = *NEWCOL(SALES)

CATEGORY = *NEWCOL(Actual)

conversion file looks like this

external              internal

Material1             FG_01

Material2             FG_01

Material3             FG_01

Material4             FG_02

Material5             FG_02

OUTPUT FILE.

1. PLANT1 -> 2010.01(TIME) -> FG_01 (Finished good) -> SALES - 20

2. PLANT1 -> 2010.01(TIME) - >FG_01 (Finished good) -> SALES - 30

3. PLANT1 -> 2010.01(TIME) - >FG_01 (Finished good) -> SALES - 40

         Here I am trying to get accumulated value of all the three records i.e SALES - 90.

How to achieve this?

Thanking you.

Praveen