I need advice on custom revenue reporting

I need advice on custom revenue reporting

I want to create a report that groups revenue by month based on invoices.  I have been a basic user for a while and in a previous life administered SFDC, so I am a little more experienced than a novice, but not much.

What a want is a summary report that groups by month for an entire year that shows me the following:

==> Account, Product, Quantity, Total Price

And I want it to group by month and total monthly revenue.  I know the raw data is all there.  I would think this should be fairly easy to do, but I'm not figuring it out.  Any advice would be great.

Thanks,.