When you use count <item>, it shows all of the corresponding items with that string as a keyword in the containers you're wearing. It doesn't, however, show you a gat danged thing in your handcart/wagon -- so I propose:
count <item> in <container>
This would function thusly: count branch in wagon or count ore in handcart. Just an easy way for people who live out of their wagons to check out how much of a specific thing they have in their wagon/handcart instead of having to do it the Hard Way and get out calculator.
count <item> in <container>
count <item> in <container>
I play: Vanja - Khadija - Solveig - Alaia
