Q4. Correction of errors. Conrad Playground Supply underwent a restructuring in 2021. The company conducted a thorough internal audit, during which the following facts were discovered. The audit occurred during 2021 before any adjusting entries or closing entries are prepared. 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. A three-year 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 (Ignore income taxes.)