During an accounting period, the following activities occurred in the general fund: $1,000 due from another fund was received. Expenditures of $5000 were paid. Revenues of $10,000 were received. Accounts payable of $2,000 was paid. Accounts receivable of $3,000 was collected. Cash at the beginning of the period was $5,000 and the fund balance at the beginning of the period was $25,000 (positive). Tara Co. owns an office building and leases the offices under a variety of rental agreements involving rent paid in advance monthly or annually. Not all tenants make timely payments of their rent. Tara's balance sheets contained the following data: 1989 1990 Rentals receivable $ 9,600 $12,400 Unearned rentals $32,000 $24,000 During 1990, Tara received $80,000 cash from tenants for current income. What amount of rental revenue should Tara record for 1990?