A company purchased factory equipment on June 1,2021 , for $151000. It is estimated that the equipment will have a $8200 salvage value at the end of its 10 -year useful life. Using the straight-line method of depreciation, the amount to be recorded as depreciation expense at December 31,2021 , is {:[$8330.],[$14280.],[$5950.],[$7140.]:}