a. Additional computers were acquired at the beginning of 2019 and added to the company's office network. The $45,000 cost of the computers was inadvertently recorded as maintenance expense. Computers have five-year useful lives and no material salvage value. This class of equipment is depreciated by the straight-line method. b. Two weeks prior to the audit, the company paid $17,000 for assembly tools and recorded the expenditure as office supplies. The error was discovered a week later. c. On December 31, 2020, merchandise inventory was understated by $78,000 due to a mistake in the physical inventory count. The company uses the periodic inventory system. d. Two years earlier, the company recorded a 4% stock dividend (2,000 common shares, $1 par) as follows: The shares had a market price at the time of $12 per share. e. At the end of 2020 , the company failed to accrue $104,000 of interest expense that accrued during the last four months of 2020 on bonds payable. The bonds, which were issued at face value, mature in 2025 . The following entry was recorded on March 1,2021 , when the semiannual interest was paid, as well as on September 1 of each year: f. A three-year liability insurance policy was purchased at the beginning of 2020 for $72,000. The full premium was debited to insurance expense at the time. Required: For each error, prepare any journal entry necessary to correct the error, as well as any year-end adjusting entry for 2021 related to the situation described. (Ignore income taxes.) (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)