Sales calculation

Hello,

I need to calculate monthly sales of my company.

As for now i have used the following condition in VBRK table.

Total sales invoices generated per month (excluding canceled invoices) - Total return invoices generated per month.

I pass these invoices in VBRP table to get he individual line items and sum them up for the given period.

The report shows division wise, sales group wise, sales district wise etc. whick also i pick up from VBRP.

Is there any condition that i need to use?

Ishan Khandelwal