Alexander Company has employed a bookkeeper who is inexperienced. On December 27, after reviewing the records for the year, you discover the following error.

On September 1, Alexander Company received $280 for services to be performed in the future. The bookkeeper recorded this by debiting Cash for $820 and crediting Service Revenue for $820.

Note: Assume that it is the company's policy to record the receipt of revenue in advance of earning it in the Deferred Revenue account.

Required: Prepare a correcting entry on December 27. Make sure to enter the day for each separate transaction.