The management of Ballard MicroBrew is considering the purchase of an automated bottling machine for $57,000. The machine would replace an old piece of equipment that costs $15,000 per year to operate. The new machine would cost $7,000 per year to operate. The old machine currently in use could be sold now for a scrap value of $25,000. The new machine would have a useful life of 10 years with no salvage value. Compute the simple rate of return on the new automated bottling machine