machine 1 cost = 82,000 salvage value = 8,000 purchase date =jan 1 estimated life= 4 years depreciation method= straight line

machine 2 cost= 46,000 salvage value = 3,600 purchase date=july 1 estimated life= 5 years depreciation method= double declining balance

calculate the depreciation expense for each machine in year 1 and year 2 for the year ended december 31 .