Analyze each of the following transactions and show the effect on the accounting equation.

1. Provide services to customers on account for $36,000.
2. Purchase equipment by signing a note with the bank for $28,000.
3. Repay $21,000 of the note in (2) above.
4. Pay utilities of $3,600 for the current month.

Note: Decreases to account classifications should be entered as a negative.