Keeping track of how much we spend on equipment and trucks.

Aloha!
I would like to keep track  (cost of fuel, and maintenance fees, etc) of what we spend on each truck, equipment.  
Can you please teach me how I can do this with Sage 100?
I wish somehow link with payable invoices and equipment costs then I do not have to enter twice in Sage.
Mahalo for your time. :)