Cutting Edge Sensors Ltd. has taken $2.5M worth of investor stock to start a 3 year project that is estimated to earn $5M by the end of the project ( $2M at end of year 2 , and $3M at the end of year 3 ). The yearly costs involved are $500,000 for the length of the project. Investors had the opportunity to invest in another project expected to earn 10% per year. What is the ROI? (format: xx.x e.g. 99.9 or 99.9 )