a b and c pls

Isabel, a calondar-year taxpayec, usos the cash method of accounting for her sole proprietorship, in late December she received a $29,000 bill from her accountant for consuting services relisted to her small business. isabef can pay the $29,000 bill anyime before January 30 of next year without penaty. Assume her marginal tax rate is 37 percent this year and next year, and that she can earn an aftertax rate of return of 12 percent on her investments. Required: a. What is the after-tax cost if isabel pays the $29,000 bill in December? b. What is the after-tax cost if isabel peys the $29,000 bili in January? Use frobitz 31 Note: Round your answer to the nearest whole doliar amount. c. Based on requirements a and b, should isabel pay the $29.000 bil in December of January? Complete this question by entering your answers in the tabs below. What is the atter-tar cost if trabei pars the 129,000 bil in December