Classify the following as one of the following:

1. Patient service revenue
2. Other exchange transaction revenue
3. Contractual adjustment
4. Other nonexchange transaction revenue
5. Not recorded revenue

1.	Received $20 as co-pay from a patient for an out-patient visit. Billed $500 to insurance.
2.	Gift shop sales amounted to $1,500.
3.	Citizens Health Insurance paid $350 as final payment on the $500 billed for the patient in transaction 1.
4.	The hospital provided medical care valued at $20,000 for homeless citizens.
5.	A grateful patient contributed $1,000 for unrestricted use by the hospital.
6.	The hospital received $500 for CPR training it provided to the city fire department.
7.	The local retirees association contributed $2,000 of labor at the hospital information desk.
8.	The hospital received a $10,000 federal grant to provide immunizations to children.
9.	Patient accounts of $500 were written off a uncollectible.
10.	Pharmaceutical firms donated recently approved drugs valued at $8,000. The hospital uses a similar type drug in its operations.