A depreciable asset with a cost of $40200 has a residual value of $2400 and a useful life of 10 years. Total estimated units of output are 75600 and in year 1 a total of 5200 units were produced. Under the straight-line method and the units-of-activity method the depreciation expense for the first year would be Straight-line Units-of-activity $3780.00 $2765.10 $4020.00 $2765.10 $4020.00 $2600.00 $3780.00 $2600.00