Units-of-activity depreciation

A truck acquired at a cost of $69,000 has an estimated residual value of $12,000, has an estimated useful life of 300,000 miles, and was driven 77,000 miles during the year. Determine the following. If required, round your answer for the depreciation rate to 2 decimal places.

(a)The depreciable cost$____?

(b)The depreciation rate$ ____per mile?

(c)The units-of-activity depreciation for the year$_____?