DAL Engineering Company acquired equipment on 1/1/2020. The economic life is estimated to be 10 years. The cost is $800,000,000 and the residual value is 0.15 TC Under the DDBM, the book value of the equipment on 1/1/2022 would be: (a) 640,000,000 (b) 512,000,000 (c) 480,000,000 (d) None of the above Select one: a. D b.A o Cc O d. B