Irwin, Inc., constructed a machine at a total cost of $68 million. Construction was completed at the end of 2012 and the machine was placed in service at the beginning of 2013. The machine was being depreciated over a 10-year life using the sum-of-the-years-digits method. The residual value is expected to be $2 million. At the beginning of 2016, Irwin decided to change to the straight-line method. Ignoring income taxes, prepare the journal entry relating to the machine for 2016.

I know I need to debit depreciation expense and credit accumulated depreciation - but I can't figure the numbers out even after looking at and following several examples on Chegg. So, can someone please help me and provide an explanation?