Total purchased amount all customers

Hi,
I have what I think would be a very easy request for someone who knows what they are doing.

In the admin->reports->customer order totals it displays the total amount spent (excluding shipping) by each customer in my default currency which is great.

Can any tell me if it is possible to have an extra line on this report or an extra report that adds all these totals together to show me the total amount for all customers. That would then give me a better idea of total profit.

If this is possible could anyone tell me how to do it, I assume it's just a case of sum all values and display but I don't have much of a clue about php.

Thanks

I haven't checked lately, but I would suspect that the Sales Report addon would likely give you that information.

thanks for the reply dr byte. I suspect you are right about the sales report addon but I thought maybe there might be a quick way to add an extra line rather than installing a whole new module.