Mercury Inc. purchased equipment in 2019 at a cost of $497,000. The equipment was expected to produce 580,000 units over the next five years and have a residual value of $33,000. The equipment was sold for $253,600 part way through 2021. Actual production in each year was: 2019 = 83,000 units 2020 = 133,000 units 2021 = 67,000 units. Mercury uses units-of-production depreciation, and all depreciation has been recorded through the disposal date. Required: 1. Calculate the gain or loss on the sale. 2. Prepare the journal entry to record the sale. 3. Assuming that the equipment was instead sold for $280,000, calculate the gain or loss on the sale. 4. Prepare the journal entry to record the sale in requirement 3.