Read the following problems carefully and provide the solutions.

1) On January 1, 2021, DEF Co. acquired a machine for a total cost of 80,000,000. The machine was depreciated using the sum-of-the-years' digits method over a period of 10 years. On January 1, 2024, DEF Co. changed its depreciation method to the double declining balance method. How much is the depreciation expense in 2024?

a. 11,635,782 b. 12,556,780 c. 13,556,702 d. 40,727,272

2) On December 31, 2021, the building of XYZ Co. was revalued. Information determined on revaluation date is as follows:

Historical cost 72,000,000

Accumulated depreciation 16,000,000

Initial estimate of residual value 8,000,000

Actual life on revaluation date 10

Replacement cost 144,000,000

Effective life 12

Remaining economic life 20

Income tax rate 30%

The estimate of residual value remained unchanged. How much is the revaluation surplus, net of tax, on December 31, 2021?

a. 25,900,000 b. 25,900,000 c. 37,000,000 d. 40,400,000

3) How much is the revised annual depreciation of XYZ Co. in periods subsequent to December 31, 2021?

a. 895,000 b. ,250,000 c. 4,650,000 d. 7,200,000