3. Skywalker Tune-up Shop services a car on July 31. The customer picks up the vehicle on August 1 and mails the payment to Luke Skywalker, the owner, on August 5. Luke receives the cheque in the mail on August 6. When should Luke show that the revenue was earned? Explain.

Skywalker Tune-up Shop services a car on July 31. The customer picks up the vehicle on August 1 and mails the payment to Luke Skywalker, the owner, on August 5. Luke receives the cheque in the mail on August 6 . When should Luke show that the revenue was earned? Explain