Irwin, Inc., constructed a machine at a total cost of $48 million. Construction was completed at the end of 2014 and the machine was placed in service at the beginning of 2015. The machine was being depreciated over a 10-year life using the straight-line method. The residual value is expected to be $2 million. At the beginning of 2018, Irwin decided to change to the sum-of-the-years-digits method. Ignoring income taxes, prepare the journal entry relating to the machine for 2018.

Please include journal entries and calculations step-by-step!