Sigma Manufacturing is comparing cold storage systems. The company uses a MARR of 12%. The company has received 3 bids. The information for each bid is in the table below: Initial Cost Efficiency Savings per Year Annual Operating & Maintenance Costs Lifespan Bid ABid B Bid C $400,000 $500,000 $600,000 80,000 $100,000 $85,000 $20,000 $30,000 $15,000 15 years 25 years 30 years