on january 1, 2021, truesdale, incorporated, purchased a piece of machinery for use in operations. the total acquisition cost was $33,000. the machine was expected to produce a total of 60,000 units during its life. the machine actually produced 16,000 units during 2021, 23,000 units during 2022, and 21,000 units during 2023. the machine has a salvage value of $3,000. using the units-of-production method, the amount of depreciation that should be recorded during 2022, is approximately