For meter billing purposes, income and cost of goods accounts need to be created to record all meter billing income and expenditure.
On the ribbon, go to Accounts > General Ledger and create the necessary asset, income and COGS accounts in the general ledger for the copier component of the business.
Using these accounts, set up the appropriate Stock GL groups for copiers.
You might set up something as simple as this:
Or perhaps, more complex, like this:
Further information: