The comparative balance sheets of Yoba Company for the years ended December 31, 2009 and 2010, reported the following selected amounts:

Total amount of office supplies purchased during 2010. __________________

Total amount of rent collected during 2010. _______________________

Assets: Office supplies inventory Liabilities: Unearned rent revenue 2009 $ 2,000 11,000 2010 $ 800 10,500 The 2010 income statement reported the following: Revenues: Rent revenue Expenses: Office supplies expense $12,000 15,000