if i may suggest :
for example today you earn sales 100 dollar, and the shipping are 20 dollar as input in copper
then what you have to do in express account is clicking receive a payment and put : 100 dollar sales and also 20 dollar freight collected.. and it will appear in your journal..
i would suggest that in your xpress acc you dont have to think about inventory stock..
i use those 3 nch apps as follow :
- inventoria as stock management.
- exp account as accounting software.
- copper to input daily sales