Classify the following cash flows as operating, investing, or financing activities:
1. Paid interest on outstanding bonds.
2. Received interest on investment.
3. Issued common shares for cash.
4. Paid dividends.
5. Paid property taxes on the company offices.
6. Received payments from customers.
7. Collected proceeds from sale of long-term investments.
8. Paid wages.
9. Purchased merchandise for cash.
10. Sold delivery equipment at a loss.