Axe Corporation is considering investing in a machine which has a cost of $25,000. The estimated life of the machine is 5yrs, with no salvage value. Axe anticipates annual net income after taxes of $1,500 from selling the product produced by the new machine. What is Axe's rate of return on average investment assuming the Axe uses straight-line depreciation and that the annual production is sold at the end of each year?