E3-15 Morris Chang Enterprises aids Chinese students upon their arrival in the United States. Paid by the Chinese government. Morris Chang collects some service revenue in advance. In other cases, he receives cash after performing relocation services. At the end of August a particularly busy period-Morris Chang's books show the following: Accounts receivable...... Unearned service revenue.. July 31 August 31 $1,900 1,200 $2,500 300 During August, Morris Chang Enterprises received cash of $7,000 from the Chinese government. How much service revenue did the business earn during August? Show your work.