In 2017, Christa purchased and placed into service five-year assets at a total cost of $2,290,000. If Christa elects both the § 179 deduction and additional first-year (bonus) depreciation, but does not elect the straight-line method, what is Christa’s depreciation expense for tax purposes for the year, assuming a half-year convention?

a. $250,000

b. $510,000

c. $1,270,000

d. $1,474,000