Classify the following cash flows as operating, investing, or financing activities.
1. Sold long-term investments for cash.
2. Received cash payments from customers.
3. Paid cash for wages and salaries.
4. Purchased inventories for cash.
5. Paid cash dividends.
6. Issued common stock for cash.
7. Received cash interest on a note.
8. Paid cash interest on outstanding notes.
9. Received cash from sale of land at a loss.
10. Paid cash for property taxes on building.