(Ignore income taxes in this problem.) The budget method that maintains a constant twelve-month planning horizon by adding a new month on the end as the current month is completed is called:Wombles Corporation is contemplating purchasing equipment that would increase sales revenues by $478,000 per year and cash operating expenses by $249,000 per year. The equipment would cost $738,000 and have a 9 year life with no salvage value. The annual depreciation would be $82,000. The simple rate of return on the investment is closest to: