Hi there, fcservices80.
I'm glad you've reached out to us. Allow me to help provide some insights on how to track transaction in QuickBooks Online (QBO).
You can post the transaction as expense account in the Chart of Accounts (COA), and mark the expense as billable if you'd like to apply to invoices. This will show up as an expense on your books and as income when invoiced, which varies significantly from product income.
To learn more about billable expense, you can check this article: How to enter billable expenses.
Don't hesitate to leave a comment below if you have any other questions. I'm always here to help.