(Ignore income taxes in this problem.) Duker Corporation is investigating the purchase

(Ignore income taxes in this problem.) Duker Corporation is investigating the purchase of equipment that would increase sales revenues by $130,000 per year and cash operating expenses by $39,000 per year. The equipment would cost $328,000 and have an 8 year life with no salvage value. The company uses straight-line depreciation on all equipment. The simple rate of return on the investment is closest to: