Plaza Co. purchased machinery for the mine site amounting to Php. 570,000 on July 1, 2008. It is estimated that it will have a useful life of 10 years, a residual value of Php. 20,000, production of 200,000 units, and 50,000 working hours. Plaza used the machinery for 3,000 hours in 2008 and 5,000 hours in 2009. The machinery produced 18,000 units in 2008 and 22,000 units in 2009.

Compute the depreciation for 2008 and 2009 using

1. straight line

2. working hours

3. output (production) method