An asset with a first cost of $50,000 and an estimated salvage value of $10,000 is depreciated by the MACRS method. If its book value at the end of year 3 is $21,850 and its market value is $25,850, the total amount of depreciation charged against the asset up to this time is closest to:

(a) $18,850

(b) $21,850

(c) $25,850

(d) $28,150