Sue, a certified public accountant, donated 60 hours of her…

Sue, a certified public accountant, donated 60 hours of her time to the Homeless Center, a nonprofit.  She spent 20 hours auditing their books and 40 hours serving food to the needy.  She normally earns $200 an hour as a CPA, and the Homeless Center normally pays $10 per hour to students when it cannot find volunteers.  How much should the Homeless Center report as contribution revenue for her services?