Please show your work.

The Acme Construction Company is the prime contractor on a new high school. The contract specifies that they are to choose the HVAC subcontractor on the basis on lowest overall (life cycle) cost over a specified, expected life of 20 years. The subcontractors have provided the following data in response to the bidding process. York Trane ($1,500,000) Carrier ($1,350,000) ($1,300,000) Initial Investment Major maintenance expense at the end of ($280,000) ($260,000) ($400,000) year 10 ($10,000) ($11,500) ($15,000) Annual operating and maintenance cost Salvage value Useful life 200,000 100,000 60,000 20 20 20 Which subcontractor should Acme use? Use a MARR of 15% in your analysis