The first audit of the books of Cullumber Limited was recently carried out for the year ended December 31, 2023. Cullumber follows IFRS, In examining the books, the auditor found that certain items had been overlooked or might have been incorrectly handled in the past: 1. At the beginning of 2021 , the company purchased a machine for $474,000 (residual value of $32,400 ) that had a useful life of 6 years. The bookkeeper used straight-line depreciation, but failed to deduct the residual value in calculating the depreciation base for the three years. 2. At the end of 2022 , the cmpany accrued sales salaries of $52,500 in excess of the correct amount. 3. A tax lawsuit related to the year 2021 was settled late in 2023. It was determined that the company owed an additional $93,000 in tax related to 2021. The company did not record a liability in 2021 or 2022, because the possibility of losing was considered remote. The company charged the $93,000 to retained earnings in 2023 as a correction of a prior year's error. 4. Cullumber purchased another company early in 2019 and recorded goodwill of $522,000. Cullumber amortized $26,100 of goodwill in 2019, and \$52.200 in each subsequent year. The tax treatment for goodwill was properly applied. 5. In 2023, the company changed its basis of inventory costing from FIFO to weighted average cost. The change's cumulative effect was to decrease net income of prior years by $51,000. The company debited this cumulative effect to Retained Earnings, and recorded the related income tax effect. The weighted average cost formula was used in calculating income for 2023. 6. In 2023 , the company wrote off $68,000 of inventory that it discovered, in 2023 , had been stolen from one of its warehouses in 2022. This loss was charged to the Loss on Impairment account in 2023