S6.4 - Calculating overall rate of return Amigo Mobility, which manufactures battery-powered mobility Scooters, has $670,000 to invest. The company is considering three different battery projects that will yield the following rates of return: Deep cycle = 17% Wet/flooded = 40% Lithium ion = 27% The initial investment required for each project is $170,000, $100,000, and $400,000, respectively. If Amigo's invests in all three projects, what will be its overall rate of return? The rate of return is %