There is a proposal to buy equipment that will cost $160,000. The new equipment will increase after tax cash flow by $45,000 during the first year. The annual cash inflow will increase by $5,000 each year, reaching $60,000 in year 4. At the end of year 4, the equipment can be sold for $15,000. What is the internal rate of return for the project (nearest 1/10 of one percent without % symbol, e.g. 12.5)