A firm is considering purchasing a new seed-counting machine. The machine will cost $79,000 and will have a 2-year service life. The selling price of the machine at the end of 2 years is expected to be $49,000 in today's dollars. The machine will generate annual revenues of $55,000 (today's dollars), but the company expects to have annual expenses of $8900 (today's dollars). The asset is classified as a 7-year MACRS property. The tax rate for the company is 21%. The general inflation rate is 6% and will impact the annual revenue, annual expenses, and salvage value. What is the inflation-free IRR' for this machine? Express your answer as a percentage between 0 and 100 rounded to the nearest tenth of a percent.