Articel Information and merchandise management

Hi, is there a possibility to get more informations in the articel? I need Articel Numbers, Costs per Articel (to get information about profit) and a merchandise management would also be nice. Is there maybe an option to place orders from an offert directly?

Is there also a module to get a signature for done work from a costumer like a delivery note? If its possible i don’t have to use multiple programs. Thanks

You may be able to add custom fields on Settings > Invoice Settings.

There is a signature option on Setting > Client Portal but it’s design for payment not for delivery.