On March 1, 2017, Minnie Company purchased machinery for $450,000. Minnie estimates that the machinery has a 10-year useful life and a $20,000 salvage value. Minnie uses the sum-of- years depreciation method and recorded depreciation normally during 2017 and 2018. On December 31, 2019, the machinery was sold for $210,000. 2017 Depreciation Expense: $65,152 (March 1, 2017 - December 31, 2017) 2018 Depreciation Expense: $71,667 (January 1, 2018 - December 31, 2018) 2019 Depreciation Expense: $63,848 (January 1, 2019 - December 31, 2019) a. Based on this information, calculate net book value of the equipment on Dec 31, 2019 at the time of the sale O$135,000 O$200,667 O$210,000 O$249,333 b. Based on this information, what is the gain or loss on the sale of the equipment on Dec. 31, 20192 O Loss of $39,333 OLoss of $240,000 OGain of $240,000 Gain of $39,333