Tennessee Corporation is analyzing a capital expenditure that will involve a cash outlay of $104,904. Estimated cash flows are expected to be $36,000 annually for four years. The present value factors for an annuity of $1 for 4 years at interest of 10%, 12%, 14%, and 15% are 3.170, 3.037, 2.914, and 2.855, respectively. The internal rate of return for this investment is?