An asset was acquired on October 1, 2021, for $78,000 with an estimated five-year life and $13,000 residual value. The company uses units-of-production depreciation and expects the asset to produce 20,000 units. Calculate the gain or loss if the asset was sold on March 31, 2024, for $58,000. Actual production was: 2021 = 500 units; 2022 = 3,000 units; 2023 = 3,500 units; 2024 = 1,000 units.

a)11,200 gain

b)19000 gain

c)6000 gain

d)12500 gain