An item of equipment acquired on January 1, at a cost of $45,000. The equipment has an estimated life of three years, (45,000 hour) and an estimated salvage of $10,000.

The equipment was used for the first year for 8,700 hour, for the second year for 3,300 hour and for the third year for 7,500 hour.

Determine the depreciation and the book value for three years, using the declining balance method, and the units of production method.