On January 1, 2018, Gopher Company purchased a new machine for $4,200,000. The new machine has an estimated useful life of nine years and the salvage value was estimated to be $150,000. Depreciation was computed using the sum-of-the-years'-digits method. What is the book value at December 31, 2019,for this machine?

Group of answer choices

$3,390,000

$2,613,331

None of the other answers are correct

$2,670,000

$2,520,000