Sierra Company is considering a long-term investment project called ZIP. ZIP will require an investment of $121,200. It will have a useful life of 4 years and no salvage value. Annual revenues would increase by $79,180, and annual expenses (excluding depreciation) would increase by $40,180. Sierra uses the straight-line method to compute depreciation expense. The company's required rate of return is 11%. Compute the annual rate of return.