Ofadhani's management is considering purchasing a $120,000 automatic bottle machine. The machine will activate a lama that costs $30,000 per year to operate. The new machine will cost $12,000 per year to operate. The old machine that is currently in use can be sold now for a salvage value of $40,000. The new machine will have a useful life of 10 years with no salvage value. Requested: Calculate the rate of return on new automated bottling machines.