On January 1, 2019, Zane Manufacturing Company purchased a machine for $40,000. The company expects to use the machine a total of 24,000 hours over the next 8 years. The estimated sales price of the machine at the end of 6 years is $4,000. The company used the machine 8,000 hours in 2019 and 12.000 in 2020 What is the straight-ine amortization expense for 2020 if Zane Manufacturing changes the estimate of useful life from 6 years to 8 years at the beginning of 2020 Round to the nearest whole dollar as needed. O A $5,142 OB. $4,500 OC. $4,286 OD. $4,857 Golden Miners purchased a mine in 2010 for $960,000. It was estimated that the mine contained 3,000,000 tonnes of ore, and would be totally worthless once wtore was extracted. Golden Miners extracted 250,000 tonnos in 2019 and 300,000 tonnes in 2020 The balance in accumulated amortization at the end of 2020 would be O A. $167.000 OB. 896,000 OC. $176,000 OD. $80,000