\"change in policy,\" or \"correction of an error.\" Identify also whether the change should be made retrospectively or prospectively. Type of Change Change (or correction) to be Made (a) The company discovered that a new addition to the warehouse had been expensed in a prior period instead of being capitalized and amortized. (b) The company realized that it was using its delivery van much more heavily in its first two years than it would use later, when it would be adding a second delivery van. As a result, the depreciation method was changed from straight-line to double declining balance. (c) When the estimated useful life of the company's equipment was reduced from ten years to five years, the estimated residual value for the equipment was changed from \\( \\$ 5,000 \\) to \\( \\$ 20,000 \\). (d) The company discovered that it was recording some vendor purchases for services when they were paid instead of when the goods were received. Payments were typically made 60 days after the receipt of the goods. Although each of the individual purchases was small, the total was significant due to the large volume of purchases involved. After the books had been closed for the year, it was discovered that no accruals had been made for these purchases. (e) The company uses ASPE and decided to switch from using the income tax payable method to using the future income tax method