Soda Pop Bottling Company bought equipment for $75,500 cash at the beginning of 2009. The estimated useful life is four years and the estimated salvage value is $3,500. The estimated productivity is 150,000 units. Units actually produced were 37,500 in 2009 and 40,000 in 2010. Calculate the depreciation expense for 2009 and 2010 under each of the three methods given. Round your answers to the nearest dollar.

1. Straight line method
2. Activity method
3. Double-declining balance method