Unrestricted net assets comprised $7,500,000 of assets and $4,500,000 of liabilities (including deferred revenues of $150,000). among the receipts recorded during the year were unrestricted gifts of $550,000 and restricted grants totaling $330,000, of which $220,000 was expended during the year for current operations and $110,000 remained unexpended at the close of the year.

volunteers from the surrounding communities regularly contribute their services to global, which normally purchases them; it pays the volunteers nominal amounts to cover their travel costs. during the year, the amount for travel paid to these volunteers aggregated to $18,000. the gross value of services performed by them, determined by reference to equivalent wages available in that area for similar services, amounted to $200,000. the university believes the contributed services enhance its assets. for the year ended june 30, 20x1, what amount should global record as contribution revenue for the volunteers' services?