Regarding Internal Catalog Issue

Hi All,

I have a issue with regarding internal catalog,for some paper products clint is mantaining the qunatity

as 1000 for example for slik paper for 1000 quantities of paper it is 660 .but if we take only 10 qunatity

from this then net value is showiing 660 instead of 66 but gross value is 0 .and at last in the total

it is giving correct

so please help me in solving the issue.

where i can get the code for this internal catalog management?

Is there any badi or fm exitst for this?

Is there any customization needed for this?

please give me some suggestion for this issue.