Bern Company purchased a tractor at a cost of $540,000. The tractor has an estimated salvage value of $60,000 and an estimated life of 8 years, or 10,000 hours of operation. The tractor was purchased on January 1, 2019 and was used 2,400 hours in 2019 and 2,100 hours in 2020. On January 1, 2021, the company decided to sell the tractor for $210,000. Bern uses the units-of-production method to account for the depreciation on the tractor. Based on this information, the Gain or Loss to be recorded on the sale of the tractor will be:

a. $150,000 Loss

b. No gain or loss on the sale

c. $150,000 Gain

d. $114,000 Loss