A real estate agent bought a building for $ Us25000 with the idea of making improvements to it and then selling it for business, in the first year they spent $ Us5000 on improvements, in the second $ Us1000 and in the third $ Us800, they also paid property tax for $ Us500 per year for the three years, finally selling it for $ Us35,000. What was the rate of return on this business? Make an analysis of the convenience of having made this investment.