EX 10-10. Depreciation By Two Methods Obj. 2 A storage tank acquired at the beginning of the fiscal year at a cost of $61,000 has an estimated residual value of $9,000 and an estimated useful life of 20 years. Determine the following: (a) the amount of annual depreciation by the straight-line method and (b) the amount of depreciation for the first and second years computed by the double- declining balance method. ANSWER Check Figure: a $2,600