VF01 net value of invoice in custom report.

Hi Experts,

There is a requirement to get Net value of invoice in a Custom report. Basically the invoice wouldn't be created yet, but delivery would be completed. In such scenario, I need to get the estimated net price as it would display while creating the invoice in VF01 transaction.

I needed help with calculating this net price in the custom report, is there any function module that I can use for the calculation or can I call any standard program related to VF01 in this net value calculation?

Any help is appreciated.