On April 1, 2021, Parks Co. purchased machinery at a cost of $42,000. The machinery is expected to last 10 years and to have a residual value of $6,000. Prepare the journal entries to record 2021 depreciation and the sale of the equipment.

• Record the depreciation for office equipment purchased on March 31, 2018 for $24,000 having no residual value sold on September 30, 2021 , depreciated over a five-year life using the straight-line method, with depreciation based on months in service.
• Record the sale of office equipment on September 30, 2021.