3) Twilight Industries purchased a machine that cost $900,000. It is expected that the machine will last 15 years and have a $90,000 salvage value. It is also expected that the machine will be able to be produce 450,000 units. a. Calculate the 1st and 2nd year of depreciation using the straight-line method. b. What is the book value of the machine at the end of the 1st year? What is the book value at the end of the 3rd year