Delivery And Bill

Hi Gurus

my problem is that

our client sentd a 1000 lit quantity of milk to the customer but this quantity is according to the Company

but the billing i made according to the quantity aprroved by that customer suppose that quantity is 990 lit

so the Company will make the invoice of 990 lit

how can we do that in SAP

And what abt that 10 lit quantity which is not billed but delivered to customer

during the transport and unloading, the 10lts has gone waste or spilled out and Customer pays only the amt of 990 lit quantity

actually the 1000lit quantity is decreas from inventory

so i want to do the

PGI of 1000lit

And invoice of 990 lit

And what abt that 10 lit quantity

Plz help

Suitable ansers will be rewared

Regards

AMOL.........