On January 1, 2019, Nobel Corporation acquired machinery at a cost of $1,600,000. Nobel adopted the straight-line method of depreciation for this machine and had been recording depreciation over an estimated life of ten years, with no residual value. At the beginning of 2022, a decision was made to change to the double-declining balance method of depreciation for this machine. Assuming a 20% tax rate, the cumulative effect of this accounting change on beginning retained earnings, is

a. $300,800.

b. $0.

c. $240,640.

d. $179,200.