1. A milling machine was purchased for $70,000. Determine the ESL and associated AW based on the maintenance and operation (M&O) costs and salvage values shown in the table below for a MARR of 10% per year. Year M&O Cost, Savage Value, $ 18,000 20,000 -22,000 24,000 35,000 30,000 25,000 2 4 20,000 2. An engineering project manager is preparing a preliminary cost estimate for a design and construction project. He had completed a similar project in 2003 with a construction cost of $35 million and wants to use the ENR construction cost index to update the cost. If the index value in 2014 is 9490, estimate the cost of construction for a similar-size project in 2014. If a closed-loop filtration system's equipment cost is $225,500 and the total plant cost is $15 million, what is the overall cost factor for the system