Shadow Services uses the accrual method and reports on a calendar year. This year Shadow agreed to a uniform cleaning contract with Odie Cleaning. Under the contract Odie bills Shadow for cleaning services as the services are provided. At year end Shadow paid Odie $2,350 for the services rendered during the year. In addition, Shadow paid Odie $700 for cleaning services expected in January of next year. What amount, if any, can Shadow deduct for the cleaning services? Explain your answer.