On Saturday, December 31, the company's owner provided ten hours of service to a customer. The company bills $100 per hour for services provided on weekends. Payment has not yet been received. The owner did not stop in the office on Saturday; as such, on December 31, the services were unbilled and unrecorded. Complete the necessary December 31 journal entry by selecting the account names from the pull-down menus and entering dollar amounts in the debit and credit columns