Alpha Construction acquired the following plant assets on January 1, 20xo: RESIDUAL ASSET COST VALUE USEFUL LIFE Office equipt $75,000 $5,000 5 years Building $200,000 $20,000 25 years Delivery equipt $250,000 $25,000 10 years Alpha Construction depreciates the office equipment using the straight-line method, the building using the double declining balance method, and the delivery equipment using the units of production method. The delivery equipment is estimated to be useful for 100,000 miles and during 20X0 was driven 33,000 miles Calculate depreciation expense for 20x0 for each of the above assets