Jake invested $10,000 in a mutual fund that returned 12% the first year. The second year he invested another $8,000 and the fund was up another 15%. Pleased with the growth of investments, he invested another $9,000 in year three and enjoyed another 9% increase. At the end of that year, the portfolio was valued at $37,460. What was Jakes average dollar-weighted return?

A. 12%

B. 49%

C. 26%

D. 17%

PLEASE SHOW EXCEL CALCULATION