You can make the expense transaction billable to the customer, marissanldnr.
To do this, you'd have to activate the billable feature in your company settings first.
Once the option is turned on, you can now create an expense:
Lastly, pull up the Profit and Loss Detail report to get the net profit data.
Please leave a reply if you have more questions about this. Thanks.
If you are using simple start as this thread says, you can not do what intuit suggests unless you move up to the plus version of QBO. Simple start does not have that option