This company purchased a semitruck at the beginning of 2021 at a cost of $100,000. The truck had an estimated life of 5 years and an estimated residual value of $20,000 and will be depreciated using the straight-line method. On January 1, 2023, the company made major repairs of $30,000 to the truck that extended its remaining useful life. Thus, starting with 2023, the truck has a remaining life of 5 years and a new salvage value of $8,000. When calculating depreciation for 2023, the company's accountant should a. expense the $30,000 and depreciate the original cost of $100,000 over its revised estimated total life. b. continue depreciating the original cost over the original useful life and depreciate the additional $30,000 cost