A company that manufactures brushless blowers invested $700,000 in an automated quality control system for blower housings. The resultant savings was $180,000 per year for 5 years. If the equipment had a salvage value of $100,000, what rate of return per year did the company make and should the company invest in the blower if MARR is 10% ? None of the above 7.31% per year (do not invest in the blower) 12.30% per year (invest in the blower) 7.31% per year (invest in the blower) 12.30% per year (do not invest in the blower)