31. GreenBuilders Inc. owns the following assets:

• Energy-Efficient Construction Equipment: Purchased for $700,000 on January 1, 2020, with an estimated useful life of 10 years and no residual value. However, on January 1, 2023, it was determined that the remaining useful life is only 7 years, with a residual value of $70,000.
• Sustainable Building Materials Factory: Constructed at a cost of $3,500,000 on July 1, 2021, with an estimated useful life of 30 years and no residual value.

Instructions: a) Calculate the depreciation expense for each asset for the fiscal year 2023. b) Determine the balance in the accumulated depreciation account for each asset on December 31, 2023. c) Compute the net amount to be reported in the 2023 financial statements for each asset as of December 31, 2023.