Answer:
No Date Account Titles and Explanation Debit Credit
1. Dec. 31 Interest expenses $400
Interest payable $400
(To record interest due on notes)
2. Dec. 31 Account receivable $2,000
Service revenue $2,000
(To record the service revenue earned)
3. Dec. 31 Salaries and wages expenses $670
Salaries and wages payable $670
(To record the alaries and wages expenses)