A business had the following transactions, among others, during May.

1. Paid $2,000 salary to a sales representative for time worked during May.

2. Paid $500 for petrol purchased for the delivery van during May.

3. Purchased a computer for $2,500 cash.

4. Paid $14,000 in settlement of a loan obtained three months earlier.

5. The owner withdrew $400 from the business for personal use.

6. Paid $500 commission to a salesman for work performed last March.

Which of these transactions represented expenses incurred for May?