Porter Business Products acquired equipment on January 1, 2014 for $470,000. The equipment has an estimated useful life of 5 years and an estimated residual value of $30,000. The equipment is expected to produce 150,000 units. During 2014, the equipment produced 24,000 units and during 2015, produced 60,000 units. Calculate the depreciation expense for 2014 and 2015 for the following methods:

Straight line

Double declining balance

Units of production