Sanders Company has employed a bookkeeper who is inexperienced. On December 26, after reviewing the records for the year, you discover the following error.

On September 1, Sanders Company received $390 for services to be performed in the future. The bookkeeper recorded this by debiting Cash for $930 and crediting Service Revenue for $930.

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