Robert Parish Corporation purchased a new machine for its assembly procces on sept 30, 2007. the cost of this machine was $217,900. the company estimated that the machinen would have a salvage value of $18,900 at the enf of its service life. its life is estimated at 8 years and its working hours are estimated at 2,000 hours. year-end is december 31.

instrucciones compute the depreciation expense under the following methods .

straight line depreciation

activity method

sum-of the year - digits

double- declining balance