Jacob Manufacturing purchased a new truck on April 1,2005 for $30,000. the truck is expected to have a residual value of $2,000 and its useful life is anticipated to be seven years. the company uses the straight-line method of depreciation. Jacod Manufacturing has December 31st year end. Calculate the deppreciation expenses for the first year December 31,2005 and calculate the depreciation expense for the second year December 2006 and calculate the net book value at December 31,2006