A tractor acquired at a cost of $420,000 has an estimated residual value of $30,000, has an

Question:

A tractor acquired at a cost of $420,000 has an estimated residual value of $30,000, has an estimated useful life of 25,000 hours, and was operated 1,850 hours during the year. Determine (a) The depreciable cost,
(b) The depreciation rate, and
(c) The units-of-output depreciation for the year?