Polly Parrott is a cash basis taxpayer with the following transactions during the tax year: Cash received from sales of products $85,000 Cash paid for expenses (except rent and interest) 30, 000 Rent paid on a leased building for four months beginning December 1 12,000 Prepaid interest on a bank loan, paid for the three months starting December 1 6,000 Four months' rent received in advance on a leased building on October 1 8,000 Calculate Polly's taxable income for the tax year from her business