So just calculate the amount of accumulated depreciation on the line, the methods are:
I. Annual average method, also known as the straight-line method. To meet the 1. interest is negligible or assumed to be zero investment cost; 2. maintenance costs are fixed throughout the life of the equipment; 3. the last year of the efficiency of the asset and the initial year of the same; 4. the use of the equipment to obtain the income is fixed throughout the life of the equipment; 5 a variety of necessary estimates can be fairly certain that the projections.
Annual depreciation = (original value of equipment - estimated net salvage value) / estimated useful life.
II. Workload method
Monthly depreciation of a fixed asset = workload of the fixed asset for the month * depreciation per workload
Depreciation per workload = original cost of the fixed asset * (1 - salvage rate) / estimated total workload.
III. Sum-of-the-years method
Annual depreciation = sum of depreciation over remaining useful life/projected useful life
IV. Double Declining Balance Method
Annual Depreciation Rate = 2/Expected Useful Life