start routine

Hai BW gurus,

i faced this problem in writing a start routine.

I have to caculate "transportation units' for that 'Route' is the key.

for calculating the same i added two info objects Z9ATSHIP & Z9APSHIP and entered there value into a defined dimension 'QTY'. Then i need to get the Base UoM from the 0MATERIAL Master data (0BASE_UOM) and convert QTY to the BaseUom (QTYBOM).

there lies the problem, for the last two steps i dont know what to do?

there is another info object callled 0MAT_UNIT which contains all the denominators and numerators for conversion.

pls help me with this.

note i am a novice in this feild so pls explain the solution with an example

thanks in advance