Isabel, a calendar-year taxpayer, uses the cash method of accounting for her sole proprietorship. In late December she received a $30,000 bill from her accountant for consulting services related to her small business. Isabel can pay the $30,000 bill anytime before January 30 of next year without penalty. Assume her marginal tax rate is 37 percent this year and next year, and that she can earn an after-tax rate of return of 6 percent on her investments. a. What is the after-tax cost if Isabel pays the $30,000 bill in December? After-tax cost b. What is the after-tax cost if Isabel pays the $30,000 bill in January? Use:Exhibit 3.1 (Round your answer to the nearest whole dollar amount.) After-tax cost c. Based on requirements a and b, should Isabel pay the $30,000 bill in December or January? O December O January EXHIBIT 3-1 Present Value of a Single Payment at Various Annual Rates of Return 4% 5% 6% 7% 8% 9% 10% 11% 12% Year 1 .962 .952 .943 .935 .926 .917 .909 .901 .893 Year 2 .925 .907 .890 .873 .857 .842 .826.812 .797 Year 3 .889 .864 .840 .816 .794 .772 .751 .731 .712 Year 4.855 .823.792 .763 .735 | .708.683.659 .636 Year 5 .822 .784 .747 .713 .681 .650 .621 .593 .567 Year 6 .790 .746 .705 .666 .630 .596 .564 .535 .507 Year 7 .760 .711 .665 .623 .583 .547 .513 .482 .452 Year 8 .731 .677 .627 .582 .540 .502 .467 .434 .404 Year 9 .703 .645 .592 .544 .500 .460 .424 .391 .361 Year 10 .676 .614 .558 .508 .463 .422 .386 .352 .322 Year 11.650 .585 .527 .475 .429 .388.350 .317 .287 Year 12.625 .557 .497 .444 .397 .356 .319 .286 .257 Year 13 .601 .530 .469 .415 .368 .326 .290 .258 .229 Year 14 .577 .505 .442 .388 .340 .299 .263 .232 .205 Year 15 .555 .481 .417 .362 .315 .275 .239 209 .183