Orange Corp. constructed a machine at a total cost of $78 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 7-year life using the sum-of-the-years'-digits method. The residual value is expected to be $6 million. At the beginning of 2018, Orange decided to change to the straight-line method. Ignoring income taxes, what will be Orange's depreciation expense for 2018? (Do not round your intermediate calculation and round final answer to 1 decimal place.)

A. 13.9 million

B. 10.3 million

C. 7.9 million

D. 6.4 million