Is-it possible to manage commercial margin ?

Is-it possible to manage commercial margin ?

Hi,

We're testing Zoho invoice and it seems to be very interesting for us, especially for its Google Apps integration.
There's only one thing that will be blocking us : apparently, there's no way to manage the purchasing price of our products, so we can't have our commercial margin :(

Are we alone in this case or this feature will be integrated to Zoho invoice in the futur ?

Thx

Fred Allard - IT2i