Ira, what if you had done $2000 in legal work for a department store, and you also had made $2000 in purchases using the store's credit card (all done in-house), and then the store goes bankrupt.
You invoice them for the $2000 in legal fees, but you get no money and will be months or years before you even know how much (if anything) you'll receive.
Then the store sends you a credit card bill for the $2000 you owe.
Do you pay off the entire $2000 balance in full, make payments on the credit card, or do you do something else?