Wilson Center is a private not-for-profit voluntary health and welfare organization. During 2010, it received unrestricted pledges of $600,000, 60 percent of which were payable in 2010, with the remainder payable in 2011 (for use in 2011). Officials estimate that 15 percent of all pledges will be uncollectible.

(a) How much should Wilson Center report as contribution revenue for 2010?

(b) In addition, a local social worker, earning $20 per hour working for the state government, contributed 600 hours of time to Wilson Center at no charge. Without these donated services, the organization would have hired an additional staff person. How should Wilson Center record the contributed service?